a)      On server1 and Server2, add a new group called “projecta”. The GID is 6000.

      Solution:  #groupadd –g 6000 projecta

b)      On sever1 only, modify the defaults before adding new users

-         the home directories to full access for owners only

Solution:

#edit  /etc/login.defs

umask 077

-         all the directories and files created by the users to have full access for the owners only.

solution

#edit  /etc/profile

umask  077 (remove #)

-         Modify the list of files and directories that are created automatically for new users

                                                               i.      Remove .muttrc and Documents

Solution

#cd  etc/skel

#rm .muttrc

#rm –r Documents

                                                             ii.      Add the directories “ProjectA” and “ProjectB”

                              Solution:

                              # mkdir ProjectA

                              # mkdir ProjectA

                              (at directory etc/skel)

b) create a directory called /jobs/projecta to be shared

-         Owner of this directory is “root”
     - The directory is also belonging to the group “projecta”
     - The group “projecta” and the owner have full access to this directory, no access at all for other users
     - Only the owners can delete their own files
     - All files created in /jobs/projecta will belong to the group “projecta” regardless of the users’ primary GID. 

solution

# cd /jobsjobs

# mkdir projecta

#chgrp projecta /jobs/ projecta

#chmod 770 /jobs/ projecta

#chmod 3770 /jobs/ projecta

c)

On Server1 edit /etc/exports

add:

/home             192.168.1.0/24 (rw,root_squash)
/jobs/projecta      192.168.1.0/24 (rw,root_squash)    note: disable firewall (rcSuSEfirewall2 stop)

#rcnfsserver start    –> to start the nfs service
#showmount -e         –> to check the mountpoint
#inserv /etc/init.d/nfsserver (to run it automatically during reboot)

On Server2

NFS Client - Need to modify the /etc/fstab file#vi /etc/fstab
-add the nfs server IP, so make sure you ifconfig kat server1.

Let say the Server1 IP is 192.168.1.154

<IP>: <directory to be shared> <directory  to mount> nfs   <defaults,sync,noexec,rsize=xx,wsize=xx>

192.168.1.154:/home                            /home                    nfs   noexec,rsize=8192,wsize=8192
192.168.1.154:/jobs/projecta                / jobs/projecta       nfs   noexec,rsize=8192,wsize=8192 

ave (:wq)

note: make sure directory /nfs/qall to be created first

#mount -a
#inserv /etc/initd/nfsserver

Question 3: Samba 

[global]

            workshop=projecta

[homes]

            path=/home

            browseable=no

            readonly=no

            hostsallow=192.168.1.0/24

            create mask=600

[projects]

            browseable=yes

            hostsallow=192.168.1.0/24   192.168.100.0/24

            create mask=600

            path=/jobs/projecta

Question 4 : Backup Script

On server 1

A shell script (bash) is to be created called /root/bin/backup. The script has to perform a differential backup of the home directories.

 a) Use the tar command

b) A full backup is to be performed on Saturdays

c) Diferential backup on Mondays to Fridays

d) Will have to know the day of the week

Answer:

mkdir /var/log/backup  <-----do this first

# vi /root/bin/backup

# !/bin/bash

dateevar='date +%F'

getfacl -R /home > /home/acls

if test 'date +%A' == "Friday' ; then

tar -cf /tmp/backup-full-$datevar.tar   /home

# if any of the tar backup fails send an email

mail -s "Backup failed" root@server1.digitalairlines.com  <~

fi

touch  /var/log/backup/last-backup