আমার পঠিত ব্লগ সমুহ

বুধবার, ১১ অক্টোবর, ২০১৭

RHCE 7 exam preparation and question solve

Note:- This only for the practice purpose. Know the exam set-up and clear your RHCE 7 in first attempt.   Wish you all the best.



Domain Name:
System1: system1.district10.example.com use as Server
System2: system2.district10.example.com use as Client
IP Address:
System1:172.24.10.110/24
System1:172.24.10.120/24
Name Server: 172.24.10.250
Gateway:172.24.10.254
Root password : zaldebro
Your Domain: district10.example.com
Your Subnet : 172.24.10.0/255.255.255.0
Yum path   http://station.district0.example.com/content/rhel7.0/x86_64/dvd

Note:(for this subnetmask CIDR value is /24)



# ssh -X  root@system1.district10.example.com
                          (or)
#ssh -X root@172.24.10.110
Password:zaldebro
[root@system1 ~]#iptables -F
[root@system1 ~] # systemctl mask iptables.service
[root@system1 ~] # systemctl mask ip6tables.service
[root@system1 ~] # systemctl mask ebtables.service


                          (or)
#ssh -X root@172.24.10.120
Password:zaldebro

[root@system1 ~]#iptables -F
[root@system2 ~] # systemctl mask iptables.service
[root@system2 ~] # systemctl mask ip6tables.service
[root@system2 ~] # systemctl mask ebtables.service















1. Enable Selinux on enforcing method

Do This on Both Server and Client
server side: (System1)
[root@system1 ~]# getenforce
[root@system1 ~]# vim /etc/sysconfig/selinux
Set SELINUX = enforcing
:wq
[root@system1 ~]#setenforce 1
[root@system1 ~]#init 6
[root@system1 ~]# getenforce
Enforcing

Client Side: (System2)
[root@system2 ~]# getenforce
[root@system2 ~]# vim /etc/sysconfig/selinux
Set SELINUX = enforcing
:wq
[root@system2 ~]#setenforce 1
[root@system2 ~]#init 6
[root@system2 ~]# getenforce
Enforcing
[root@ system2 ~]#



Yum Client Configuration

2.Configure repository. Create a Repository for your virtual machines. The URL is

http://station.district0.example.com/content/rhel7.0/x86_64/dvd

Do This on Both Server and Client
System1 :
[root@ system1 ~]# cd /etc/yum.repos.d/

[root@ system1 ~]# vim system1.repo
  
[system1]
name=server
baseurl=http://station.district0.example.com/content/rhel7.0/x86_64/dvd
enabled=1
gpgcheck=0

[root@ system1 ~]# yum clean all

[root@ system1 ~]# yum repolist all






System 2:

[root@ system2 ~]# cd /etc/yum.repos.d/

[root@ system2 ~]# vim system1.repo
  
[system2]
name=client
baseurl=http://station.district0.example.com/content/rhel7.0/x86_64/dvd
enabled=1
gpgcheck=0

[root@ system2 ~]# yum clean all

[root@ system2 ~]# yum repolist all



3. SSH Configuration.
-Clients within my133ilt.org should NOT have access to ssh on your systems
-Clients with domain district10.example.com should be able to access the systems

           in case you my133ilt.org has  (172.25.70.0/255.255.0.0)
    
Ans:

Do This on Both Server and Client

[root@ system1 ~]# vim /etc/hosts.allow
sshd: *.district10.example.com        (Note    sshd:space *.given domain nam)
:wq
(or)

[root@ system1 ~]# vim /etc/hosts.allow
sshd: 172.25.10.0/255.255.255.0          (Note    sshd:space *.given domain address)


[root@ system1 ~]# vim /etc/hosts.deny
sshd: *.my133ilt.org                         (Note     sshd:space *.given domain name)
:wq


[root@ system1 ~]# vim /etc/hosts.deny
sshd: 172.25.70.0/255.255.255.0                (Note    sshd:space *.given domain address)                  

4. Port forwarding.
 -Configure system1 to forward traffic incoming on port 80/tcp from source network
172.24.X.0/255.255.255.0  to port on 5243/tcp

Ans:

Server side

client:(to verify in your local environment ask me if not working)
server5.example.com:5243

[root@ system1 ~]# firewall-cmd - -permanent - -add-rich-rule 'rule family=ipv4 source address=172.24.10.0/24 forward-port port=5243 protocol=tcp to-port=80'

[root@ system1 ~]# firewall-cmd  - -reload

[root@ system1 ~]# firewall-cmd  - -list-rich-rules

    ( or)

Configure serverX to forward traffic incoming on port 80/tcp from source network
172.25.X.0/255.255.255.0 to port on 5243/tcp.

[root@ system1 ~]# firewall-config

Configuration : Permanent

Select Rich Rule Tab

click Add

Family : ipv4
Check Elements forward-port    [      Click this  tab        ]
                        |
                        |
                              V
                                                       protocol          : tcp
                Port / Port Range:  5243
                       
                                             Destination
                check Local forwarding
                   Port / Port Range:  80
                                                        
                                                               click [ok]
Source :172.24.10.0/24
click   [OK]
click option reload Firewalld   (in terminal put # firewall-cmd  - -list-rich-rules  )




5. User Environment.

-Create a command called qstat on both system1 and system2. It should able to execute the following
command(ps eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm)
The command should be executable by all users..

Ans:

Server side :
[root@ system1 ~]# vim /bin/qstat

    ps eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm

:wq

[root@ system1 ~]#chmod a+x /bin/qstat

[root@ system1 ~]#qstat

PID      TID       CLS RTPRIO     NI    PRI    PSR    %CPU        STAT     WCHAN               COMMAND
1271     1271      TS       -        0     19      0      0.0             Ss+     poll_schedule_    Xorg
1502     1502      TS       -       0     19     0      0.0              Ss+     n_tty_read             agetty
1632     1632      TS       -     0     19      0     0.0              Ss       wait                   bash
29595    29595    TS       -           0    19      0      0.0              S+       wait                   bash
29596    29596    TS       -          0    19      0      0.0               R+      -                      ps

Client side :
[root@ system1 ~]# vim /bin/qstat

     ps eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm

:wq

[root@ system1 ~]#chmod a+x /bin/qstat

[root@ system1 ~]#qstat

PID      TID       CLS RTPRIO     NI    PRI    PSR    %CPU        STAT     WCHAN               COMMAND
1271     1271      TS       -        0     19      0      0.0             Ss+     poll_schedule_    Xorg
1502     1502      TS       -       0     19     0      0.0              Ss+     n_tty_read             agetty
1632     1632      TS       -     0     19      0     0.0              Ss       wait                   bash
29595    29595    TS       -           0    19      0      0.0              S+       wait                   bash
29596    29596    TS       -          0    19      0      0.0               R+      -                      ps

______________________________________________________________________________________





6.IPV 6 Connection
-Configure eth0 with a static ipv6 addresses as follows.
-configure a static IPV6 address in system1  as fddb:fe2a:ab1e::c0a8:64/64.
-configure a static IPV6 address in system2 as fddb:fe2a:ab1e::c0a8:02/64.
-Both machines are able to communicate within the network fddb:fe2a:able/64
-The changes should be permanent even after the reboot
Ans :
Server Side:

[root@ system1 ~]#nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   

[root@ system1 ~]#nmcli device status

DEVICE  TYPE      STATE         CONNECTION  
eth0      ethernet   connected      System eth0
eno1    ethernet   disconnected   --          
eno2    ethernet   disconnected   --          
lo        loopback  unmanaged      --

[root@ system1 ~]# nmcli connection modify "System eth0" ipv6.addresses fddb:fe2a:ab1e::c0a8:64/64  ipv6.method manual

[root@ system1 ~]# nmcli connection up "System eth0"

Client Side:

[root@ system2 ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   

[root@ system2 ~]# nmcli device status

DEVICE  TYPE      STATE         CONNECTION  
eth0      ethernet   connected      System eth0
eno1    ethernet   disconnected   --          
eno2    ethernet   disconnected   --          
lo        loopback  unmanaged      --

[root@ system2 ~]# nmcli connection modify "System eth0" ipv6.addresses fddb:fe2a:ab1e::c0a8:02/64
ipv6.method manual

[root@ system2 ~]# nmcli connection up "System eth0"

Client Side:-

[root@ system2 ~]#  ping6 fddb:fe2a:ab1e::c0a8:64

Server Side:-
[root@ system1 ~]# ping6 fddb:fe2a:ab1e::c0a8:02  (do this on both side if packet transmited & received same means                correct other wise wrong  )
______________________________________________________________________________________

7.  Link aggregation Configure your system1 and system2, which watches for link changes and selects
an active port for data transfers. System1 should have the address as 172.24.10.10/255.255.255.0.
System2 should have the address as 172.24.10.20/255.255.255.0

[root@ system1 ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   

[root@ system1 ~]# nmcli device status

DEVICE  TYPE      STATE         CONNECTION  
eth0      ethernet   connected      System eth0
eno1    ethernet   disconnected   --          
eno2    ethernet   disconnected   --          
lo        loopback  unmanaged      –

System1 Side:
[root@ system1 ~]# nmcli connection add type team ifname team config '{"runner": {"name": "activebackup"}}'
[root@ system1 ~]#  nmcli connection modify team-team ipv4.addresses 172.24.10.10/24 ipv4.method manual
[root@ system1 ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   
team-team    e10a27c3-bd4a-431a-a284-50375a3c4717  team            team   

[root@ system1 ~]#  nmcli connection add type team-slave ifname eno1 master team
[root@ system1 ~]# nmcli connection add type team-slave ifname eno2 master team
[root@ system1 ~]# nmcli connection up team-team
[root@ system1 ~]# teamdctl team state
setup:
 runner: activebackup
ports:
 eno1
   link watches:
     link summary: up
     instance[link_watch_0]:
       name: ethtool
       link: up
 eno2
   link watches:
     link summary: up
     instance[link_watch_0]:
       name: ethtool
       link: up
runner:
 active port: eno2

Client Side :
[root@ system2 ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   

[root@ system2 ~]#  nmcli device status

DEVICE  TYPE      STATE         CONNECTION  
eth0      ethernet   connected      System eth0
eno1    ethernet   disconnected   --          
eno2    ethernet   disconnected   --          
lo        loopback  unmanaged      –

System2 Side:
[root@ system2 ~]# nmcli connection add type team ifname team config '{"runner": {"name": "activebackup"}}'
[root@ system2 ~]#  nmcli connection modify team-team ipv4.addresses 172.24.10.20/24 ipv4.method manual
[root@ system2 ~]#  nmcli connection show

NAME         UUID                                  TYPE            DEVICE
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0   
team-team    e10a27c3-bd4a-431a-a284-50375a3c4717  team            team   

[root@ system2 ~]# nmcli connection add type team-slave ifname eno1 master team
[root@ system2 ~]#  nmcli connection add type team-slave ifname eno2 master team
[root@ system2 ~]# nmcli connection up team-team
[root@ system2 ~]# teamdctl team state
setup:
 runner: activebackup
ports:
 eno1
   link watches:
     link summary: up
     instance[link_watch_0]:
       name: ethtool
       link: up
 eno2
   link watches:
     link summary: up
     instance[link_watch_0]:
       name: ethtool
       link: up
runner:
 active port: eno2

server side:-
#ping -I team-team 172.25.10.20
____________________________________________________________________________________
8. SMTP Configuration. Configure the SMTP mail service on system1 and system2 which relay the mail
only from local system through station.network0.example.com, all outgoing mail have their sender
domain as district10.example.com. Verify the mail server is working by sending mail to a local user clarke.
Check the mail on both system1 and system2 with the below URL

http://rhcert.district0.example.com

System1

[root@ system1 ~]#  yum install postfix* -y

[root@ system1 ~]# firewall-cmd –permanent –add-service=smtp

[root@ system1 ~]# firewall-cmd –reload

[root@ system1 ~]# systemctl restart postfix.service

[root@ system1 ~]# systemctl enable postfix.service

[root@ system1 ~]# vim /etc/postfix/main.cf

Line No 99  : (Remove # ) myorigin = district10.example.com

Line No 116  : inet_interfaces = loopback-only

Line No 164 : mydestination =

Line No 317 : (Remove # ) relayhost = [station.network0.example.com]

[root@ system1 ~]# systemctl restart postfix.service

[root@ system1 ~]# mail -s “HAI” clarke

This is test mail
.
EOT

To Verify

Click the above Links
System2

[root@ system2 ~]#  yum install postfix* -y

[root@ system2 ~]# firewall-cmd –permanent –add-service=smtp

[root@ system2 ~]# firewall-cmd –reload

[root@ system2 ~]# systemctl restart postfix.service

[root@ system2 ~]# systemctl enable postfix.service

[root@ system2 ~]# vim /etc/postfix/main.cf

Line No 99  : (Remove # ) myorigin = district10.example.com

Line No 116  : inet_interfaces = loopback-only

Line No 164 : mydestination = “”

Line No 317 : (Remove # ) relayhost = [station.network0.example.com]

[root@ system2 ~]# systemctl restart postfix.service

[root@ system2 ~]# mail -s “HAI” clarke

This is test mail
.
EOT

To Verify




9. NFS server

  -  Configure system1 with the following requirements.
  -   Share the /nfsshare directory within the district10.example.com domain clients only, share must not be writable.

Ans:

[root@ system1 ~]# yum install nfs* -y

[root@ system1 ~]# systemctl start nfs-server

[root@ system1 ~]# systemctl enable nfs-server

[root@ system1 ~]# mkdir /nfsshare
(Note : Here no need to give nfsnobody permission for read only share)

[root@ system1 ~]# vim  /etc/exports

/nfsshare       *.district10.example.com(ro,sync)

:wq

[root@ system1 ~]# exportfs -a
[root@ system1 ~]# exportfs -r
[root@ system1 ~]# exportfs

[root@ system1 ~]# systemctl restart nfs-server

[root@ system1 ~]# firewall-cmd --permanent --add-service=nfs

[root@ system1 ~]# firewall-cmd --permanent --add-service=rpc-bind
t
[root@ system1 ~]# firewall-cmd --permanent –add-service=mountd

[root@ system1 ~]# firewall-cmd –reload

[root@ system1 ~]# showmount -e 172.24.10.110
Export list for server2:
/nfsshare    *. district10.example.com


Nfs mount

-Mount /nfsshare directory on system2 under /public directory persistently at system boot time.
Ans:

[root@ system2 ~]# mkdir /public

[root@ system2 ~]#  yum install nfs-utils* -y

[root@ system2 ~]# vim /etc/fstab

172.24.10.110:/nfsshare   /public nfs     defaults        0       0

:wq

[root@ system2 ~]# mount -a
[root@ system2 ~]#  df -h

Filesystem                    Size         Used     Avail    Use%     Mounted on
/dev/vda1                        10G         3.1G      7.0G     31%     /
devtmpfs                  906M      0          906M      0%     /dev
tmpfs                        921M     140K     921M      1%     /dev/shm
tmpfs                         921M     17M      904M      2%     /run
tmpfs                         921M     0          921M      0%     /sys/fs/cgroup
172.24.10.110:/nfsshare   10G      3.6G      6.5G      36%     /public

[root@ system2 ~]#  cd  /public

Read Only share Output:

[root@ system2 public]# touch nfs.txt

    touch: cannot touch ‘777’: Read-only file system









      
                                  

NFS KERBEROS

NFS Secure:

-Share the /nfssecure, enable krb5p security to secure access to the NFS share from
URL http://station.network0.example.com/pub/keytabs/system1.keytab

Create a directory named as protected under /nfssecure The exported directory should have
read/write access from all subdomains of the distric10.example.com domain. Ensure the directory
/nfssecure/protected should be owned by the user harry with read/write permission..

  
[root@ system1 ~]# yum install nfs* krb5* -y ( we already installed nfs package for previous                               
                                                                            normal share he we just    install krb5 packages only )   
                                                                                               
[root@ system1 ~]#  wget  -O  /etc/krb5.keytabhttp://server1.domain70.example.com/pub/keytabs/system1.keytab

  
Saving to: ‘/etc/krb5.keytab’

100%[============================================================================================================>] 1,242       --.-K/s   in 0s      

2015-12-15 13:06:28 (137 MB/s) - ‘/etc/krb5.keytab’ saved [1242/1242]   
[root@ system1 ~]# systemctl start nfs-server

[root@ system1 ~]# systemctl start nfs-secure

[root@ system1 ~]# systemctl start nfs-secure-server

[root@ system1 ~]# systemctl enable nfs-server

[root@ system1 ~]# systemctl enable nfs-secure

[root@ system1 ~]# systemctl enable nfs-secure-server

[root@ system1 ~]# mkdir -p  /nfssecure/protected         

[root@ system1 ~]# firewall-cmd --permanent --add-service=nfs

[root@ system1 ~]# firewall-cmd --permanent --add-service=rpc-bind

[root@ system1 ~]# firewall-cmd --permanent  - -add-service=mountd

[root@ system1 ~]# firewall-cmd - -reload





[root@ system1 ~]# chown  harry  /nfssecure/protected

[root@ system1 ~]# vim /etc/exports

/nfssecure    *.district10.example.com(rw,sync,sec=krb5p)

:wq

[root@ system1 ~]# systemctl restart nfs-secure-server

[root@ system1 ~]# showmount -e 172.24.10.110
Export list for server2:
/nfsshare    *.district10.example.com
/nfssecure *.district10.example.com

NFS Secure Client:

Mount /nfssecure/protected with krb5p secured share on system2 beneath /secure/protected
provided with keytab http://station.network0.example.com/pub/keytabs/system2.keytab
The user harry able to write files on /secure directory

#  yum install nfs-utils* krb5*  -y

# mkdir /secure/protected

# setfacl -m u:harry:rwx /secure/

# wget  -O  /etc/krb5.keytab   http://station.network0.example.com/pub/keytabs/system2.keytab

# systemctl start nfs-secure

# systemctl enable nfs-secure

# vim /etc/fstab

172.24.10.110:/nfsshare   /public nfs     defaults        0       0
172.24.10.110:/nfssecure/protected   /secure/protected nfs     defaults, sec=krb5p        0       0

:wq

# mount -a





# df -h

Filesystem                                Size           Used     Avail    Use%     Mounted on
/dev/vda1                               10G            3.1G      7.0G     31%     /
devtmpfs                         906M         0      906M      0%     /dev
tmpfs                               921M        140K     921M      1%     /dev/shm
tmpfs                                921M         17M      904M      2%     /run
tmpfs                                921M         0      921M      0%     /sys/fs/cgroup
172.24.10.110:/nfsshare             10G          3.6G      6.5G      36%     /public
172.24.10.110:/nfssecure/protected    10G          3.3G  6.8G      33%     /secure/protected

  password:

# df -h

Filesystem                                Size           Used     Avail    Use%     Mounted on
/dev/vda1                               10G            3.1G      7.0G     31%     /
devtmpfs                         906M         0      906M      0%     /dev
tmpfs                               921M        140K     921M      1%     /dev/shm
tmpfs                                921M         17M      904M      2%     /run
tmpfs                                921M         0      921M      0%     /sys/fs/cgroup
172.24.10.110:/nfsshare             10G          3.6G      6.5G      36%     /public
172.24.10.110:/nfssecure/protected    10G          3.3G  6.8G      33%     /secure/protected

Read/Write Share Output:

[harry@system2  ~ ] # cd  /secure/protected

[harry@system2 secure/protected ] # touch one; mkdir two

[harry@system2 secure ] # ls
one two
















SAMBA :

11. SMB access.
Share the /sambadir directory via SMB on system1 Your SMB server must be a member of the STAFF
workgroup The share name must be data .The data share must be available to
district10.example.com domain clients only The data share must be browseable .Susan must have
read access to the share, authenticating with the same password “password”, if necessary

[root@ system1 ~]# yum install samba* -y

[root@ system1 ~]# systemctl start smb nmb

[root@ system1 ~]# systemctl enable smb nmb
ln -s '/usr/lib/systemd/system/smb.service' '/etc/systemd/system/multi-user.target.wants/smb.service'
ln -s '/usr/lib/systemd/system/nmb.service' '/etc/systemd/system/multi-user.target.wants/nmb.service'

[root@ system1 ~]# firewall-cmd --permanent --add-service=samba
success

[root@ system1 ~]# firewall-cmd --reload
success

[root@ system1 ~]# mkdir  /sambadir

[root@ system1 ~]# semanage fcontext -a -t samba_share_t '/sambadir(/.*)?'

[root@ system1 ~]# restorecon -Rv /sambadir/
restorecon reset /sambadir context unconfined_u:object_r:default_t:s0->unconfined_u:object_r:samba_share_t:s0

[root@ system1 ~]# ll -Zd /sambadir/
drwxr-xr-x. root root unconfined_u:object_r:samba_share_t:s0 /sambadir/

(all the samba user will be added in our machine because it all are domain users )

[root@ system1 ~]# smbpasswd -a Susan
New SMB password:password
Retype new SMB password:password
Added user Susan.

[root@ system1 ~]# smbpasswd -a frankenstein
New SMB password:SaniTago
Retype new SMB password:SaniTago
Added user frankenstein.

[root@ system1 ~]# smbpasswd -a martin
New SMB password:SaniTago
Retype new SMB password:SaniTago
Added user martin.

[root@ system1 ~]# ll -d /sambadir/
drwxr-xr-x. 2 root root 6 Dec 16 10:12 /sambadir/

[root@ system1 ~]# vim /etc/samba/smb.conf

Line No 89 : workgroup =  STAFF

Line No end of the Document:

[data]
path=/sambadir
hosts allow=172.24.10.
browseable=yes
valid users=susan
read list=susan

:wq

[root@ system1 ~]# systemctl restart smb nmb

[root@ system1 ~]# smbclient -L //172.24.10.110

Enter root's password: (just enter)
Anonymous login successful
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]

    Sharename       Type      Comment
    ---------               ----        -------
    data                   Disk      
    IPC$                 IPC       IPC Service (Samba Server Version 4.1.1)
Anonymous login successful
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]
    Server               Comment
    ---------               -------
    SYSTEM1   Samba Server Version 4.1.1

    Workgroup        Master
    ---------              -------
    STAFF            
[root@ system1 ~]# smbclient //172.24.10.110/data -U Susan
Enter susan's password:
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
 .                                   D        0  Wed Dec 16 10:12:30 2015
 ..                                  D        0  Wed Dec 16 10:12:30 2015

        40913 blocks of size 262144. 27465 blocks available
smb: \>

12.SAMBA Mount

Share /opstack with SMB share name must be cluster.
The user frankenstein has readable,writeable,accesseable to the /opstack SMB share. The user martin
has read access to the /opstack SMB share. Both users should have the SMB passwd "SaniTago".

The share must be browseable

Mount the samba share /opstack permanently beneath /mnt/smbspace on system2 as a multiuser
mount. The samba share should be mounted with the credentials of martin.

[root@ system1 ~]# mkdir /opstack

[root@ system1 ~]# ll -Zd /opstack/
drwxr-xr-x. root root unconfined_u:object_r:default_t:s0 /opstack/

[root@ system1 ~]# semanage fcontext -a -t samba_share_t '/opstack(/.*)?'

[root@ system1 ~]# restorecon -Rv /opstack/
restorecon reset /opstack context unconfined_u:object_r:default_t:s0->unconfined_u:object_r:samba_share_t:s0

[root@ system1 ~]# ll -lZd /opstack/
drwxr-xr-x. root root unconfined_u:object_r:samba_share_t:s0 /opstack/

[root@ system1 ~]# chmod 775 /opstack/
[root@ system1 ~]# chgrp frankenstein /opstack/

[root@ system1 ~]# vim /etc/samba/smb.conf

Line No 89 : workgroup =  STAFF

Line No end of the Document:

[data]
path=/sambadir
hosts allow=172.24.10.
browseable=yes
valid users=Susan
read list=Susan

[cluster]
path=/opstack
valid users=@frankenstein,martin
read list=martin
write list=@frankenstein

:wq



[root@server2 ~]# systemctl restart smb.service nmb.service
[root@server2 ~]# smbclient -L //172.24.10.110
Enter root's password:  (just enter)
Anonymous login successful
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]

    Sharename            Type      Comment
    ---------                 ----      -------
    data                   Disk      
    cluster              Disk      
    IPC$                       IPC       IPC Service (Samba Server Version 4.1.1)
Anonymous login successful
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]

    Server                  Comment
    ---------                 -------
    SYSTEM1         Samba Server Version 4.1.1

    Workgroup            Master
    ---------                  -------
    STAFF    

[root@server2 ~]# smbclient //172.24.10.110/cluster -U frankenstein
Enter frankenstein's password:
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]
smb: \> mkdir test
 .                                   D        0  Wed Dec 16 10:32:03 2015
 ..                                  D        0  Wed Dec 16 10:32:03 2015

        40913 blocks of size 262144. 27466 blocks available
smb: \> exit

[root@server2 ~]# smbclient //172.24.10.110/cluster -U martin
Enter martin's password:
Domain=[STAFF] OS=[Unix] Server=[Samba 4.1.1]
smb: \> ls
 .                                   D        0  Wed Dec 16 10:32:03 2015
 ..                                  D        0  Wed Dec 16 10:32:03 2015

        40913 blocks of size 262144. 27466 blocks available
smb: \> exit

SAMBA Client :

12. Smb mount.

-mount the samba share /opstack permanently beneath /mnt/smbspace on system2 as a multiuser mount.
-the samba share should be mounted with the credentials of martin.

[root@desktop2 ~]# yum install cifs-utils* -y

[root@desktop2 ~]# mkdir /mnt/smbspace

MultiUser Mount
[root@desktop2 ~]# vim /etc/fstab

//172.25.2.11/cluster /mnt/smbspace   cifs    credentials=/root/credential.txt,multiuser     0       0

:wq

[root@desktop2 ~]# vim /root/credential.txt

username=martin
password=SaniTago( press enter)
:wq

[root@desktop2 ~]# mount -a
[root@desktop2 ~]# df -h
Filesystem                            Size     Used    Avail    Use%    Mounted on
/dev/vda1                              10G     3.1G     6.9G     31%    /
devtmpfs                            906M     0     906M      0%     /dev
tmpfs                                  921M     80K    921M      1%       /dev/shm
tmpfs                                 921M    17M    904M      2%    /run
tmpfs                                 921M    0    921M      0%    /sys/fs/cgroup
//172.25.2.11/cluster               10G                 3.3G     6.8G     33%   /mnt/smbspace
172.24.70.25:/nfsshare             10G                3.6G      6.5G      36%     /public
172.25.70.25:/nfssecure/protected    10G                 3.3G  6.8G      33%     /secure/protected
[root@desktop2 ~]# cd /mnt/smbspace/
[root@desktop2 smbspace]# touch samba.txt
read only file system touch cannot allow


   









WEB SERVER

Normal :
– Implement a webserver for the site http://system1.district10.example.com
– Download the webpage from
  http://station.district0.example.com/pub/rhce/rhce.html
– rename the downloaded file in to index.html.
– copy the file into the document root.
– Do not make any modification with the content of the index.html.
– Webserver must be available to clients with domain district10.example.com
– Clients within my22ilt.org should NOT access the webserver on your systems



[root@system1 ~]# systemctl start httpd
[root@system1 ~]#  systemctl enable httpd
ln -s '/usr/lib/systemd/system/httpd.service' '/etc/systemd/system/multi-user.target.wants/httpd.service'
[root@system1 ~]#  firewall-cmd --permanent --add-service=http
success
[root@system1 ~]#  firewall-cmd --reload
success
[root@system1 ~]#  cd /var/www/html/
[root@system1 html]# wget  http://station.district0.example.com/pub/rhce/rhce.html

[root@system1  html]# ls
rhce.html
[root@system1  html]# mv rhce.html index.html
[root@system1  html]# ls
index.html
[root@system1  html]# mv rhce.html index.html
[root@system1  html]# ls
index.html
[root@system1  html]# systemctl restart httpd.service  
[root@system1  html]# vim /etc/httpd/conf/httpd.conf

<virtualhost *:80>
servername system1.district10.example.com
documentroot /var/www/html
</virtualhost>

[root@system1  html]# httpd -t
Syntax OK
[root@system1  html]# systemctl restart httpd.service
[root@system1  html]# cd



[root@system1 ~]# vim /etc/hosts.deny
[root@system1 ~]# cat /etc/hosts.deny
#
# hosts.deny    This file contains access rules which are used to
#        deny connections to network services that either use
#        the tcp_wrappers library or that have been
#        started through a tcp_wrappers-enabled xinetd.
#
#        The rules in this file can also be set up in
#        /etc/hosts.allow with a 'deny' option instead.
#
#        See 'man 5 hosts_options' and 'man 5 hosts_access'
#        for information on rule syntax.
#        See 'man tcpd' for information on tcp_wrappers
#
#
sshd: *.my133ilt.org
httpd: *.my22ilt.org

:wq

[root@ system1 ~]# vim /etc/hosts.allow
sshd: *.district10.example.com   
httpd: *.district10.example.com

:wq

[root@system1  ~]# systemctl restart httpd.service
[root@system1 ~]#

use firefox


this normal webpage

[root@system1 ~]# yum install elinks* -y

[root@system1 ~]# elinks system1.example.com

this normal webpage

client side

[root@system1 ~]# elinks system1.example.com

this normal webpage

Secure Web Page Hosting

Secured webserver
– configure the website https://system1.district10.example.com with TLS
– SSLCertificate file http://classroom.example.com/pub/rhce/tls/certs/system1.networkX.crt
– SSLCertificatekeyfile
http://classroom.example.com/pub/rhce/tls/private/system1.networkX.key
– SSL CA certificate file http://classroom..example.com/pub/exampleca.crt

[root@system1 ~]# yum install httpd* mod_ssl* -y

[root@system1 ~]# vim /etc/httpd/conf.d/ssl.conf


Line No 56: <VirtualHost _default_:443>
Line No 59: DocumentRoot "/var/www/html"
Line No 60:ServerName  https://system1.district10example.com:443
Line No 70:SSLEngine on
Line No 75:SSLProtocol all -SSLv2
Line No 80:SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5
Line No 93:(remove #)SSLHonorCipherOrder on

Line No 100: SSLCertificateFile /etc/pki/tls/certs/system1.network10.crt   (change local host to your          
                                                                                                                                         system hostname)    

Line No 107: SSLCertificateKeyFile /etc/pki/tls/private/system1.network10.key  (change local host to
                                                                                                                                   your system hostname)

Line No 122 : SSLCACertificateFile /etc/pki/tls/certs/exampleca.crt

</virtualhost>

[root@system1 ~]# cd /etc/pki/tls/certs/
[root@system1  certs]# wget http://classroom.example.com/pub/tls/certs/system1.network10.crt

[root@system1  certs]# wget http://classroom.example.com/pub/exampleca.crt

[ [root@system1  certs]# cd /etc/pki/tls/private/

[root@system1  private]# wget http://classroom.example.com/pub/tls/private/system1.network10.key

[root@system1  private]# cd
[root@system1 ~]# systemctl restart httpd.service


[root@system1 ~]# firewall-cmd --permanent --add-service=https
success

[root@system1 ~]# firewall-cmd --reload
success
[root@system1 ~]#


use firefox


this normal webpage


Confidential Web Hosting

webpage content modification.

Implement website for http://system1.district10.example.com/owndir
Create a directory named as “owndir” under the document root of webserver
Download http://station.network0.example.com/pub/rhce/restrict.html
rename the file into index.html
The content of the owndir should be visible to everyone browsing from your local
system but should not be accessible from other location
User harry can edit the contents of the directory

[root@system1 ~]#  cd /var/www/html/

[root@system1 html]# mkdir owndir

[root@system1 html]# cd owndir/

[root@system1 owndir]# wget http://station.district0.example.com/pub/rhce/restrict.html

[root@system1 owndir]# ls

restrict.html

[root@system1 owndir]# mv restrict.html index.html

[root@system1 owndir]# ls

index.html

[root@system1 owndir]# vim /etc/httpd/conf/httpd.conf

[root@system1 owndir]# chown harry /var/www/html/owndir/


<virtualhost *:80>
servername system1.district10.example.com
documentroot /var/www/html
</virtualhost>

<directory /var/www/html/owndir>
order deny,allow
deny from all
allow from 172.24.10.110
</directory>

[root@system1 ~]# systemctl restart httpd.service

firefox:


  this restricted page

client :

[root@system2 ~]# firefox



1.  Forbidden
You don't have permission to access /owndir on this server.


















Virtual hosting.
                                       

– Setup a virtual host with an alternate document root .
– Extend your web to include a virtual for the site http://www.district10.example.com
– Set the document root as   /usr/local/vhost
– Download http://station.network0.example.com/pub/rhce/vhost.html
– rename it as index.html place this document root of the virtual host
– Note: The other websites configures for your server must still accessible.
vhosts.networkX.example.com is already provide by the name server on
example.com

[root@system1~]# mkdir /usr/local/vhost

[root@system1~]# cd /usr/local/vhost

[root@system1 vhost]# wget  http://station.network0.example.com/pub/rhce/vhost.html

[root@system1 vhost]# semanage fcontext -a -t httpd_sys_content_t ' /usr/local/SIT
(/.*)?'

[root@system1 vhost]# restorecon -Rv /usr/local/SIT/
restorecon reset /usr/local/vhost context unconfined_u:object_r:usr_t:s0->unconfined_u:object_r:httpd_sys_content_t:s0
restorecon reset /usr/local/vhost/vhost.html context unconfined_u:object_r:usr_t:s0->unconfined_u:object_r:httpd_sys_content_t:s0

[root@system1 vhost]# ls
vhost.html

[root@system1 vhost]# mv vhost.html index.html

[root@system1 SIT]# ls
index.html

[root@system1 SIT]# vim /etc/httpd/conf/httpd.conf

<virtualhost *:80>
servername www.district10.example.com
documentroot /usr/local/vhosts
</virtualhost>

<directory /usr/local/vhosts>
require all granted
</directory>


[root@system1 ~]# vim /etc/hosts

172.25.10.110  www.district10.example.com
:wq

firefox

this is virtual web page

client side :
(In our Examination no need to put hosts entry , if “hosts entry” entered also no issuses)

[root@system2 ~]# vim /etc/hosts

 172.25.10.110  www.district10.example.com

:wq

firefox

this is virtual web page























Dynamic Webpage configuration.

-configure website http://dynamic.district10.example.com:8899 on system1 with the document root/var/www/scripts
-site should executes webapp.wsgi
-page is already provided on http://station.district0.example.com/pub/webapp.wsgi
-content of the script should not be modified.

[root@system1~]# mkdir -p /var/www/scripts

[root@system1~]#  yum install mod_wsgi* -y

[root@system1~]# cd /var/www/scripts

[root@system1~]# semanage fcontext -a -t httpd_sys_script_exec_t '/var/www/scripts(/.*)?'

[root@system1~]#  semanage port -a -t http_port_t -p tcp 8899

[root@system1~]# firewall-cmd - -permanent  - -add-port=8899/tcp

[root@system1~]# firewall-cmd - -reload

[root@system1~]#  wget   http://station.district0.example.com/pub/webapp.wsgi


[root@server70 ~]# restorecon -Rv /var/www/scripts

restorecon reset /var/www/scripts  context unconfined_u:object_r:var_t:s0->unconfined_u:object_r:httpd_sys_script_exec_t:s0
restorecon reset /var/www/scripts/webapp.wsgi context unconfined_u:object_r:var_t:s0->unconfined_u:object_r:httpd_sys_script_exec_t:s0

[root@server70 ~]# vim /etc/httpd/conf/httpd.conf

listen 8899
<virtualhost *:8899>
servername dynamic.district10.example.com
documentroot /var/www/scripts
WSGIScriptAlias / /var/www/scripts/webapp.wsgi
</virtualhost>

<directory /var/www/scripts>
require all granted
</directory>

[root@system1 ~]# vim /etc/hosts

172.25.10.110  dynamic.district10.example.com
:wq

O/P

Goto Firefox

 Address: dynamic.distrcit10.example.com:8899

      UNIX EPOCH time is now: 1450238773.24
  (if you press F5 time time will be automatically changed)

18. Script 1

-create a script on serverX called /root/random with following details.
-When run as /root/random user, should bring the output as kernel
-When run as /root/random kernel, should bring the output as user
-When run with any other arguments or without argument,
should bring the stderr as /root/random user|kernel

[root@server2 ~]# vim /root/random
read a
case $a in
user    )       echo    "kernel";;
kernel    )       echo    "user";;
*    )       echo    "/root/random user|kernel" >> stderr
esac

[root@server2 ~]# chmod a+x /root/random
[root@server2 ~]# /root/random
user
kernel
[root@server2 ~]# /root/random
kernel
user
[root@server2 ~]# /root/random
f
[root@server2 ~]# ls
anaconda-ks.cfg  random  stderr
[root@server2 ~]# cat stderr
/root/random user|kernel
[root@server2 ~]#  

19. Script 2

-Create a script on serverX called /root/createusers
-When this script is called with the testfile argument, it should add all the users from the file
-Download the file from http://station.district0.example.com/pub/rhce/testfile
-All users should have the login shell as /bin/false, password not required.
-When this script is called with anyother arguments, it should print the message as Input File Not Found
-When this script is run without any arguments, it should display Usage: /root/createusers
Note: If the users are added no need to delete.


[root@server2 ~]# cat testfile
arul
john
david

[root@server2 ~]# vim /root/createusers

a=""
case "$@" in
testfile        )       for i in `cat /root/testfile`
do
useradd -s      /bin/false      $i
done;;
$a)echo "Input File Not Found";;
*)echo  "Usage: /root/createusers";;
esac

[root@server2 ~]# chmod a+x /root/createusers

[root@server2 ~]# /root/createusers
Usage: /root/createusers

[root@server2 ~]# /root/createusers 111
Input File Not Found


[root@server2 ~]# tail -n 5 /etc/passwd
pulse:x:171:171:PulseAudio System Daemon:/var/run/pulse:/sbin/nologin
gdm:x:42:42::/var/lib/gdm:/sbin/nologin
gnome-initial-setup:x:993:991::/run/gnome-initial-setup/:/sbin/nologin
tcpdump:x:72:72::/:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin

[root@server2 ~]# /root/createusers testfile

[root@server2 ~]# tail -n 5 /etc/passwd
tcpdump:x:72:72::/:/sbin/nologin
apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin
arul:x:1001:1001::/home/arul:/bin/false
john:x:1002:1002::/home/john:/bin/false
david:x:1003:1003::/home/david:/bin/false
MARIADB :

22.MaridDB Configuration
Configure a MariaDB on System1 with a database name Contacts.
The Database must be accessible locally only.
The root password must be zaldebro.
Apart from root, only the user Zyuichi must be able to query the Contacts Database.
Zyuichi must be identified by zaldebro.
Restore a database on system1 from the backup file
http://station.district0.example.com/pub/rhce/backup.mdb
23.MariaDB Query
Find the first name of user with password “ecosystem”

MariaDB [student]> use mysql

MariaDB [mysql]> show tables;

MariaDB [mysql]> show grants for john@'172.25.5.%';

MariaDB [mysql]> select * from tables_priv;

[root@server2 ~]# yum groupinstall mariadb mariadb-client -y

[root@server2 ~]# systemctl start mariadb
[root@server2 ~]# systemctl enable mariadb
ln -s '/usr/lib/systemd/system/mariadb.service' '/etc/systemd/system/multi-user.target.wants/mariadb.service'
[root@server2 ~]# firewall-cmd --permanent --add-service=mysql
success
[root@server2 ~]# firewall-cmd --permanent --add-port=3306/tcp
success
[root@server2 ~]# firewall-cmd --reload
success
[root@server2 ~]# vim /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-networking=1 (this line )  {note if skip-networking=1 means deny remote login
                                                     skip-networking=0 means allow remote login)

[root@server2 ~]# mysql_secure_installation

Enter current password for root (enter for none): ( if fresh installation means just enter)
Set root password? [Y/n] Y

New password: zaldebro
Re-enter new password: zaldebro
Password updated successfully!
Reloading privilege tables..
... Success!
Remove anonymous users? [Y/n] y
... Success!

Disallow root login remotely? [Y/n] y
... Success!

Remove test database and access to it? [Y/n] y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reload privilege tables now? [Y/n] y
... Success!

[root@server2 ~]# mysql -u root -p
Enter password: zaldebro

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 10
Server version: 5.5.35-MariaDB MariaDB Server

Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

MariaDB [(none)]> create database Contacts;

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
Contacts            |
+--------------------+
4 rows in set (0.00 sec)

MariaDB [(none)]> exit
Bye

[root@server2 ~]# wget  http://station.district0.example.com/pub/rhce/backup.mdb
--2015-12-16 12:24:49--  http://station.district0.example.com/pub/rhce/backup.mdb
Resolving c (c)... 172.25.254.254
Connecting to c (c)|172.25.254.254|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3785 (3.7K)
Saving to: ‘backup.mdb’

100%[============================================================================================================>] 3,785       --.-K/s   in 0s      

2015-12-16 12:24:49 (460 MB/s) - ‘backup.mdb’ saved [3785/3785]

[root@server2 ~]# ls
anaconda-ks.cfg  backup.mdb

[root@server2 ~]# mysql -u root -p Contacts < backup.mdb
Enter password: zaldebro

[root@server2 ~]# mysql -u root -p
Enter password: zaldebro

MariaDB [(none)]> use  Contacts

Database changed
MariaDB [Contacts]> show tables;
+-------------------+
| Tables_in_student |
+-------------------+
| category          |
| manufacturer      |
| product           |
+-------------------+
3 rows in set (0.00 sec)

MariaDB [Contacts]> describe product;
+-----------------+--------------+------+-----+---------+----------------+------------
| Field                   | Type            | Null | Key | Default  | Extra                  |
+-----------------+--------------+------+-----+---------+----------------+-----------------
| id                     | int(11)                  | NO   | PRI | NULL    | auto_increment |
| name                    | varchar(100)         | NO   |        | NULL    |                  |
| price                  | double          | NO   |        | NULL    |                            |
| stock                   | int(11)         | NO   |        | NULL    |                          |
| id_category           | int(11)         | NO   |        | NULL    |                          |
| id_manufacturer    | int(11)         | NO   |        | NULL    |                          |
+-----------------+--------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)

MariaDB [student]> help grant
  example:

CREATE USER 'jeffrey'@'localhost' IDENTIFIED BY 'mypass';
GRANT ALL ON db1.* TO 'jeffrey'@'localhost';
GRANT SELECT ON db2.invoice TO 'jeffrey'@'localhost';
GRANT USAGE ON *.* TO 'jeffrey'@'localhost' WITH MAX_QUERIES_PER_HOUR 90;

MariaDB [student]> create user 'Zyuichi'@'localhost' identified by 'zaldebro';
Query OK, 0 rows affected (0.00 sec)

MariaDB [student]> grant all on student.product to 'Zyuichi'@'localhost';
Query OK, 0 rows affected (0.00 sec)

MariaDB [student]> Select  first name from tablename where password=”echosystem”;

Client :
[root@desktop2 ~]# yum groupinstall mariadb-client* -y
[root@desktop2 ~]# mysql -u root -p -h 172.25.2.11
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'desktop2.example.com' (using password: YES)
[root@desktop13 ~]# mysql -u Zyuichi -p -h 172.25.13.11
Enter password: zaldebro
ERROR 1130 (HY000): Host 'desktop13.example.com' is not allowed to connect to this MariaDB server
[root@desktop13 ~]#
17) script:1

--->create a script on serverX called /root/random with the following details
--->when run as /root/random Postconf, should bring the output as "Postroll"
--->when run as /root/random Postroll, should bring the output as "Postconf"
--->when run with only other argument or wihout argument, should bring the stderr as
"/root/random Postconf | Postroll"

$@ is to refer argument as a separate word
case Stating this is conditioned structure to reduce difficulties from a normal statement like   
        if/then/elif/then/else
“”  To disabled meaning of special characters

#vim /root/random
case $@ in
postconf ) echo "Postroll";;
Postroll ) echo "postconf";;
        *) echo "/root/random postconf | Postroll";;
esac

#chmod a+x /root/random


18) script 2:

--->create a script on serverX called /root/createusers
--->when this script is called with the test file argument, it should add all the users from the file
--->downloaded the fire from http://station.network0.example.com/pub/testfile
--->all user should have the login shell as /bin/false, passwd not required.
--->when this script is called wih anyother argument, it should print the message "Input File Not Found"
--->When this script is run without any argument, it should dissplay "Usage "/root/createuser"
Note:- If the users are added no need to delete.


Ans:
#wget http://classroom.example.com/pub/testfile

#vim /root/createusers

a=""
case $@ in
testfile ) for b in `cat testfile`
do
useradd -s /bin/false $b;
done;;
$a ) echo "Usage:/root/createusers";;
* ) echo "Input file Not Found";;
esac

#chmod a+x /root/createusers



21. ISCSI Storage.
               -  Create a new 3GB target on your system1.district10.example.com.
               -  The logical block name should be lvm The server should export an iscsi disk
                  called iqn.2015-12.com.example.district10:system1
               -  This target should only be allowed  only be allowed to system2

[root@server2 ~]# yum install target* -y
[root@server2 ~]# systemctl start target
[root@server2 ~]# systemctl enable target
ln -s '/usr/lib/systemd/system/target.service' '/etc/systemd/system/multi-user.target.wants/target.service'
[root@server2 ~]# firewall-cmd --permanent --add-port=3260/tcp
success
[root@server2 ~]# firewall-cmd --reload
success
[root@server2 ~]# fdisk -l
[root@server2 ~]# fdisk /dev/vda
Command (m for help): p
   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *        2048   472143871   236070912   83  Linux
/dev/vda2       472143872   488396799     8126464   82  Linux swap / Solaris
Command (m for help): n
Partition type:
  p   primary (0 primary, 0 extended, 4 free)
  e   extended
Select (default p): e
Partition number (1-4, default 1):
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519):
Using default value 20971519
Partition 1 of type Extended and of size 10 GiB is set
Command (m for help): n
Partition type:
  p   primary (0 primary, 1 extended, 3 free)
  l   logical (numbered from 5)
Select (default p): l
Adding logical partition 5

First sector (4096-20971519, default 4096):
Using default value 4096
Last sector, +sectors or +size{K,M,G} (4096-20971519, default 20971519): +4G
Partition 5 of type Linux and of size 4 GiB is set
Command (m for help): t
Partition number (1,5, default 5): 5
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@server2 ~]# partprobe /dev/vda
[root@server2 ~]# pvcreate /dev/vda5
 Physical volume "/dev/vda5" successfully created
[root@server2 ~]# vgcreate one /dev/vdb5
 Volume group "one" successfully created
[root@server2 ~]# lvcreate -L +3G -n two /dev/mapper/one
 Logical volume "two" created
[root@server2 ~]# targetcli
/> /backstores/block create lvm /dev/mapper/one-two
Created block storage object lvm using /dev/mapper/one-two.

/> /iscsi create  iqn.2015-12.com.example.district10:system1
Created target iqn.2015-12.com.example.district10:system1.
Created TPG 1.
/> /iscsi/iqn.2015-12.com.example.district10:system1/tpg1/acls create  iqn.2015- 12.com.example.district10:system2
Created Node ACL for iqn.2015-12.com.example.district10:system2
/> /iscsi/iqn.2015-12.com.example.district10:system1/tpg1/luns create /backstores/block/lvm
Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.2015-12.com.example.district10:system2
/> /iscsi/iqn.2015-12.com.example.district10:system2/tpg1/portals create 172.24.10.110
Using default IP port 3260
Created network portal 172.24.10.110:3260.
/> saveconfig
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json
/> exit
Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json

[root@server2 ~]# systemctl restart target.service

















 ISCSI Initiator
             
-The system1 provides an iscsi port(3260).
-connect the disk with system2.district10.example.com and configure filesystem with the following requirements.
-Create 2040 MB partition on ISCSI block device and assign the filesystem as ext3.
-Mount the volume under /mnt/initiator at the system boot time.


Client :
[root@desktop2 ~]# yum install iscsi-initiator-utils* -y
[root@desktop2 ~]# vim /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2015-12.com.example.district10:system2
:wq
[root@desktop2 ~]# systemctl restart iscsi iscsid.service
[root@desktop2 ~]# systemctl enable iscsi iscsid.service
ln -s '/usr/lib/systemd/system/iscsid.service' '/etc/systemd/system/multi-user.target.wants/iscsid.service'
[root@desktop2 ~]# iscsiadm -m discovery -t st -p 172.25.2.11
172.25.2.11:3260,1 iqn.2015-12.com.example.district10:system1
[root@desktop2 ~]# iscsiadm -m node -T iqn.2015-12.com.example.district10:system1 -p 172.25.2.11
[root@desktop2 ~]# iscsiadm -m node -T iqn.2015-12.com.example.district10:system1 -p 172.25.2.11 -l
Logging in to [iface: default, target: iqn.2015-12.com.example.district10:system1, portal: 172.25.2.11,3260] (multiple)
Login to [iface: default, target: iqn.2015-12.com.example.district10:system1, portal: 172.25.2.11,3260] successful.
[root@desktop2 ~]# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda          8:0       0   3G   0 disk
vda      253:0       0  10G  0 disk
└─vda1 253:1   0  10G  0 part /
vdb       253:16   0  10G  0 disk

[root@desktop2 ~]# fdisk /dev/sda
Command (m for help): p
 Device Boot      Start         End      Blocks   Id  System
Command (m for help): n
Partition type:
  p   primary (0 primary, 0 extended, 4 free)
  e   extended
Select (default p): p
Partition number (1-4, default 1):
First sector (8192-6291455, default 8192):
Using default value 8192
Last sector, +sectors or +size{K,M,G} (8192-6291455, default 6291455): +2048M
Partition 1 of type Linux and of size +2048MBs  set

Command (m for help): p
 Device Boot      Start         End      Blocks   Id  System
/dev/sda1            8192     1646591      819200   83  Linux
Command (m for help): w
[root@desktop2 ~]# partprobe /dev/sda
[root@desktop2 ~]# mkfs.ext3 /dev/sda1
[root@desktop2 ~]# mkdir /mnt/initiator
[root@desktop2 ~]# vim /etc/fstab
/dev/sda1       /mnt/initiator  ext3     _netdev    0       0
:wq

[root@desktop2 ~]# mount -a
[root@desktop2 ~]# df -h
Filesystem                              Size         Used    Avail         Use%         Mounted on
//172.25.2.11/OPENGROUP             10G                 3.3G    6.8G                33%             /mnt/smbspace
172.24.70.25:/nfsshare             10G          3.6G        6.5G                 36%               /public
172.25.70.25:/nfssecure/protected    10G          3.3G    6.8G                 33%            /secure/protected
/dev/sda1                      2024M           33M   1998M               5%             /mnt/initiator

RHCE 7 QUESTIONS and Answer
Domain Name:
System1:  system1.district10.example.com
System2:  system2.district10.example.com
IP Address:
System1:172.24.10.110/24
System1:172.24.10.120/24
Name Server: 172.24.10.250
Gateway:172.24.10.254
Root password : zaldebro

1.Configure selinux.  Configure your systems that should be running in Enforcing.
2.Configure repository.  Create a Repository for your virtual machines. The URI ishttp://station.district0.example.com/content/rhel7.0/x86_64/dvd
3. SSH configuration.
Clients within my133ilt.org should NOT have access to ssh on your systems
Clients with domain district10.example.com should be able to access the systems
4. Port forwarding
Configure system1 to forward traffic incoming on port 80/tcp from source network 172.24.X.0/255.255.255.0 to port on 5243/tcp
5. User Environment.  
Create a command called qstat on both system1 and system2.  It should able to execute the following command(ps eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm)
The command should be executable by all users.


6. Ipv6 network.  
Configure eth0 with a static ipv6 addresses as follows.  
Configure a Static IPv6 address in system1 as fddb:fe2a:ab1e::c0a8:64/64.
Configure a Static IPv6 address in system2 as fddb:fe2a:ab1e::c0a8:02/64.
Both machines are able to communicate within the network fddb:fe2a:able/64
The changes should be permanent even after the reboot
7. Link aggregation  Configure your system1 and system2, which watches for link changes and selects an active port for data transfers.  System1 should have the address as 172.24.10.10/255.255.255.0.  System2 should have the address as 172.24.10.20/255.255.255.0
8. SMTP Configuration.  Configure the SMTP mail service on system1 and system2 which relay the mail only from local system through station.network0.example.com, all outgoing mail have their sender domain as example.com.  Verify the mail server is working by sending mail to a local  user clarke.
Check the mail on both system1 and system2 with the below URL
9. NFS server.
Configure system1 with the following requirements.  
Share the /nfsshare directory within the example.com domain clients only, share must not be writable.  Share the /nfssecure, enable krb5p security to secure access to the NFS share from URI​​http://station.network0.example.com/pub/keytabs/system1.keytab  
Create a directory named as protected under /nfssecure  The exported directory should have read/write access from all subdomains of the example.com domain.  Ensure the directory /nfssecure/protected should be owned by the user harry with read/write permission.
10. Nfs mount
Mount /nfsshare directory on system2 under /public directory persistently at system boot time.  Mount /nfssecure/protected with krb5p secured share on system2 beneath /secure/protected provided with keytab http://station.network0.example.com/pub/keytabs/system2.keytab
The user harry able to write files on /secure directory
11. Smb access
Share the /sambadir directory via SMB on system1  Your SMB server must be a member of the STAFF workgroup  The share name must be data .The data share must be available to district10.example.com domain clients only  The data share must be browseable .Susan must have read access to the share, authenticating with the same password “password”, if necessary
12.SAMBA Mount
Share /opstack with SMB share name must be cluster.
The user frankenstein has readable,writeable,accessible to the /opstack SMB share.  The user martin has read access to the /opstack SMB share.  Both users should have the SMB passwd "SaniTago".
The share must be browseable
Mount the samba share /opstack permanently beneath /mnt/smbspace on system2 as a multiuser mount.  The samba share should be mounted with the credentials of martin.
13.  Webserver.
Implement a webserver for the site​​ http://system1.district10.example.com
Download the webpage from​​http://station.district0.example.com/pub/rhce/rhce.html  
Rename the downloaded file in to index.html.
copy the file into the document root.
Do not make any modification with the content of the index.html.
Webserver must be available to clients with domain district10.example.com
Clients within my22ilt.org should NOT access the webserver on your systems
14) Secured webserver
configure the website​​https://system1.example.com​with TLS
SSLCertificate file http://classroom.example.com/pub/rhce/tls/certs/system1.networkX.crt
SSLCertificatekeyfile http://classroom.example.com/pub/rhce/tls/private/system1.networkX.key  
SSL CA certificate file​​http://classroom.example.com/pub/exampleca.crt
15) Webpage content modification.
Implement website for ​​http://system1.district10.example.com/owndir
Create a directory named as "owndir" under the document root of webserver
Download http://station.network0.example.com/pub/rhce/restrict.html  
Rename the file into index.html  
The content of the owndir should be visible to everyone browsing from your local system but should not be accessible from other location
User harry can edit the contents of the directory
16) Virtual hosting
Setup a virtual host with an alternate document root.  Extend your web to include a virtual for the site​​http://www.district10.example.com
Set the document root as /usr/local/vhosts
Download​​http://station.network0.example.com/pub/rhce/vhost.html  
Rename it as index.html  place this document root of the virtual host  
Note: The other websites configures for your server must still accessible. vhosts.networkX.example.com is already provide by the name server on example.com
17. Dynamic Webpage Configuration.  
Configure website​​http://dynamic.district10.example.com:8899 on system1 with the documentroot /var/www/scripts  Site should executes webapp.wsgi.
Page is already provided on​ ​http://station.district0.example.com/pub/webapp.wsgi  Content of the script should not be modified.
18) Script1  
Create a script on system1 called /root/random with following details.  When run as /root/random user, should bring the output as "user"  When run as /root/random kernel, should bring the output as "user"  When run with any other argument or without argument, should bring the stderr as "/root/random user|kernel"
19) Script2
Create a script on system1 called /root/createusers  When this script is called with the argument, it should add all the users from the file  Download the file from​​http://station.district0.example.com/pub/testfile
All users should have the login shell as /bin/false, password not required.  
When this script is called with anyother argument, it should print the message as "Input File Not Found"  When this script is run without any argument, it should display "Usage: /root/createusers"

20.  ISCSI Storage
Create a new 3GB target on your system1.district10.example.com.  The logical block name should be lvm  The server should export an iscsi disk called iqn.2015-12.com.example.district10:system1.  This target should only be allowed to system2
21. ISCSI Initiator
The system1 provides an iscsi port(3260).
connect the disk with system2.district10.example.com and configure filesystem with the following requirements.  
Create 2040 MB partition on ISCSI block device and assign the filesystem as ext3.
Mount the volume under /mnt/initiator at the system boot time.
22.MaridDB Configuration
Configure  a MariaDB on System1 with a database name Contacts.
The Database must be accessible locally only.
The root password must be zaldebro.
Apart from root, only the user Zyuichi must be able to query the Contacts Database.
Zyuichi must be identified by zaldebro.
Restore a database on system1 from the backup file http://station.district0.example.com/pub/rhce/backup.mdb
23.MariaDB Query
Find the first name of user with password “ecosystem”


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