There is a HTTP server 192.168.0.254 and all required packages are dumped in /var/www/html/rhel5 of that server. Install the Redhat Enterprise Linux 5 by creating following partitions:
/1000
/boot200
/home1000
/var1000
/usr4000
swap2X256 (RAM SIZE)
Answer and Explanation:
Note: Examiner will provide you the Installation startup CD. And here mentioned size may vary see on the exam paper.
1.Insert the CD on CD-ROM and start the system.
2.In Boot: Prompt type linux askmethod
3. It will display the Language, keyboard selection.
4. It will ask you for the installation method.
5. Select the HTTP from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the Web site name and Redhat Enterprise Linux Directory.
Specify the HTTP Server: 192.168.0.254
Directory: rhel5 Because Default Directory for http is /var/www/html
8. After Connecting to the HTTP Server Installation start. Go upto the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should be
care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
There is a NFS server 192.168.0.254 and all required packages are dumped in /var/ftp/pub of that server and the /var/ftp/pub directory is shared. Install the Redhat Enterprise Linux 5 by creating following partitions:
/1000
/boot200
/home1000
/var1000
/usr4000
swap2X256 (RAM SIZE)
Answer and Explanation:
Note: Examiner will provide you the Installation startup CD. And here mentioned size may vary see on the exam paper.
1.Insert the CD on CD-ROM and start the system.
2.In Boot: Prompt type linux askmethod
3. It will display the language, keyboard selection.
4. It will ask you for the installation method.
5. Select the NFS Image from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the NFS Server Name and Redhat Enterprise Linux Directory.
Specify the NFS Server: 192.168.0.254
Directory: /var/ftp/pub
8. After Connecting to the NFS Server Installation start in GUI. Go up to the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
One NIS Domain named rhce.com is configured in your lab, server is 192.168.0.254. rhce100, rhce200,rhce300 user are created on domain server. Make your system as a member of rhce.com domain. Make sure that when nis user login in your system home directory should get by them. Home directory is separately shared on server eg /home/stationx/ where x is you station number.
Answer and Explanation:
1. Use the authconfig --nisserver=
Example: authconfig --nisserver=192.168.0.254 –nisdomain=rhce.com --update
or
system-config-authentication
2. Click on Enable NIS
3. Type the NIS Domain: rhce.com
4. Type Server 192.168.0.254 then click on next and ok
5. You will get a ok message.
6. vi /etc/auto.master and write at the end of file
/home/stationx /etc/auto.home --timeout=60
7. vi /etc/auto.home and write
* -rw,soft,intr 192.168.0.254:/home/stationx/&
Note: please specify your station number in the place of x.
8. Service autofs restart
9. Login as the rhce1 or rhce2 or rhce3 on another terminal will be
Success.
According to question, rhce.com domain is already configured. We have to make a client of rhce.com domain and automatically mount the home directory on every client. To make a member of domain, we use the autheconfig with options or system-config-authentication command. There a are lots of authentication server i.e NIS, LDAB, SMB etc. NIS is a RPC related Services, no need to configure the DNS, we should specify the NIS server address.
Here Automount feature is available. When user tried to login, home directory will automatically mount. The automount service reads the configuration from /etc/auto.master file.
On /etc/auto.master file we specified the mount point the configuration file for mount point.
Create the group named sysuser.
Answer and Explanation:
1.groupadd sysuser
groupadd command is used to create the group and all group information is stored in /etc/group file.
Make on /storage directory that only the user owner and group owner member can fully access.
Answer and Explanation:
1.chmod 770 /storage
2.Verify using : ls –ld /storage
Preview should be like:
drwxrwx--- 2 root sysusers 4096 Mar 16 18:08 /storage
To change the permission on directory we use the chmod command. According to the question that only the owner user (root) and group member (sysusers) can fully access the directory so: chmod 770 /archive
Install the Redhat Linux RHEL 5 through NFS. Where your Server is server1.example.com having IP 172.24.254.254 and shared /var/ftp/pub. The size of the partitions are listed below:
/1048
/home1028
/boot 512
/var 1028
/usr2048
Swap->1.5 of RAM Size
/dataconfigure the RAID Level 0 of remaining all free space.
After completing the installation through NFS solve the following questions. There are two networks 172.24.0.0/16 and 172.25.0.0/16. As well as there are two domains example.com on 172.24.0.0/16 network and cracker.org on 172.25.0.0/16 network. Your system is based on example.com domain. SELinux should be in enforcing mode.
Answer and Explanation:
1. Insert the CD on CD-ROM and start the system.
2. In Boot: Prompt type linux askmethod
3. It will display the language, keyboard selection.
4. It will ask you for the installation method.
5. Select the NFS Image from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the NFS Server Name and Redhat Enterprise Linux Directory.
Specify the NFS Server: 172.24.254.254
Directory: /var/ftp/pub
8. After Connecting to the NFS Server Installation start in GUI. Go up to the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10.Create the two RAID partitions having equal size of remaining all free space.
11.Click on RAID button
12.Type mount point /data
13.Select RAID Level 0
14.Click on ok
15. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
Change the Group Owner of /data to training group.
Answer and Explanation:
chown or chgrp command is used to change the ownership.
Syntax of chown: chown [-R] username:groupname file/directory
Syntax of chgrp: chgrp [-R] groupname file/directory
Whenever user creates the file or directory, the owner of that file/directory automatically will be that user and that user’s primary group name.
To change group owner ship
or
chown root.training /data Which set the user owner to root and group owner to training group.
Verify /data using: ls -ld /data
You will get: drwxr-xr-x 2 root training …………..
There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and 192.168.1.254 IP Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network’s Host.
Answer and Explanation: At exam time read the Lab Scenario carefully. Actually there are two different networks one is 192.168.0.0/24 where your system resides know as example.com domain and another is 192.168.1.0/24 know as cracker.org domain.
One server named sever1.example.com having 192.168.0.254 and 192.168.1.254 is running in your exam. If you make a gateway to that server, you will can ping because IP forwarding is enabled on that server.
1.vi /etc/sysconfing/network
NETWORKING=yes
HOSTNAME=station?.example.com
GATEWAY=192.168.0.254
2.service network restart
Or
1.vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=X.X.X.X
NETMASK=X.X.X.X
GATEWAY=192.168.0.254
2.ifdown eth0
3.ifup eth0
Note: If gateway is specified in both file, default gateway takes from interface specific file.
One Package named zsh is dump on ftp://server1.example.com under /pub/updates directory and your FTP server is 192.168.0.254. Install the package zsh.
Answer and Explanation:
1.rpm –ivh ftp://server1/example.com/pub/updates/zsh-*
or
1.Login to ftp server : ftp ftp://server1.example.com using anonymous user.
2.Change the directory: cd pub and cd updates
3.Download the package: mget zsh-*
4.Quit from the ftp prompt : bye
5.Install the package
6.rpm -ivh zsh-*
7.Verify either package is installed or not : rpm -q zsh
You are a System administrator. Using Log files very easy to monitor the system. Now there are 50 servers running as Mail, Web, Proxy, DNS services etc. You want to centralize the logs from all servers into on LOG Server. How will you configure the LOG Server to accept logs from remote host ?
Answer and Explanation:
By Default system accept the logs only generated from local host. To accept the Log from other host configure:
SYSLOGD_OPTIONS="-m 0 -r"
Where
-m 0 disables 'MARK' messages.
-r enables logging from remote machines
-x disables DNS lookups on messages recieved with -r
Successfully resolv to server1.example.com where your DNS server is 172.24.254.254
Answer and Explanation:
nameserver 172.24.254.254
On every clients, DNS server is specified in /etc/resolv.conf. When you request by name it tries to resolv from DNS server .
You are new System Administrator and from now you are going to handle the system and your main task is Network monitoring, Backup and Restore. But you don’t know the root password. Change the root password to redhat and login in default Runlevel.
Answer and Explanation:
When you Boot the System, it starts on default Runlevel specified in /etc/inittab:
Id:?:initdefault:
When System Successfully boot, it will ask for username and password. But you don’t know the root’s password. To change the root password you need to boot the system into single user mode. You can pass the kernel arguments from the boot loader.
ro root=LABEL=/ rhgb queit s
Add a new logical partition having size 100MB and create the /data which will be the mount point for the new partition.
Answer and Explanation:
Some users home directory is shared from your system. Using showmount –e localhost command, the shared directory is not shown. Make access the shared users home directory.
Answer and Explanation:
1.Verify the File whether Shared or not ? : cat /etc/exports
2.Start the nfs service: service nfs start
3.Start the portmap service: service portmap start
4.Make automatically start the nfs service on next reboot: chkconfig nfs on
5.Make automatically start the portmap service on next reboot: chkconfig portmap on
6.Verify either sharing or not: showmount –e localhost
7.Check that default firewall is running on system ? if running flush the iptables using iptables –F and stop the iptables service.
You are working as a System Administrator at Certpaper. Your Linux Server crashed and you lost every data. But you had taken the full backup of user’s home directory and other System Files on /dev/st0, how will you restore from that device?
Answer and Explanation:
1. Go to on that directory where you want to restore.
2. restore –rf /dev/st0
To restore from backup we use the restore command. Here backup will restore from /dev/st0 on current Directory.
Add a job on Cron schedule to display Hello World on every two Seconds in terminal 8.
Answer and Explanation:
1.cat >schedule
*/2 * * * * /bin/echo “Hello World” >/dev/tty8
Cron helps to schedule on recurring events. Pattern of Cron is:
MinuteHourDay of MonthMonth Day of WeekCommands
0-590-231-311-120-7 where 0 and 7 means Sunday.
Note * means every. To execute the command on every two minutes */2.
To add the scheduled file on cron job: crontab filename
To List the Cron Shedule: crontab –l
To Edit the Schedule: crontab –e
To Remove the Schedule: crontab –r
Add a cron schedule to take full backup of /home on every day at 5:30 pm to /dev/st0 device.
Answer and Explanation:
1.vi /var/schedule
30 17 * * * /sbin/dump -0u /dev/st0 /dev/hda7
2.crontab /var/schedule
3.service crond restart
We can add the cron schedule either by specifying the scripts path on /etc/crontab file or by creating on text file on crontab pattern.
cron helps to schedule on recurring events. Pattern of cron is:
MinuteHourDay of MonthMonth Day of WeekCommands
0-590-231-311-120-7 where 0 and 7 means Sunday.
Note * means every. To execute the command on every two minutes */2.
One Domain RHCE is configured in your lab, your domain server is
server1.example.com. nisuser2001, nisuser2002, nisuser2003 user are created on your server 192.168.0.254:/rhome/stationx/nisuser2001. Make sure that when NIS user login in your system automatically mount the home directory. Home directory is separately shared on server /rhome/stationx/ where x is your Station number.
Answer and Explanation:
1. use the authconfig or system-config-authentication
2. Select the [*] USE NIS
3. Type the NIS Domain: RHCE
4. Type Server 192.168.0.254 then click on next and ok
5. You will get a ok message.
6. Create a Directory /rhome/stationx where x is your station number.
6. vi /etc/auto.master and write at the end of file
/rhome/stationx /etc/auto.home --timeout=60
7. vi /etc/auto.home and write
* -rw,soft,intr 192.168.0.254:/rhome/stationx/&
Note: please specify your station number in the place of x.
8. Service autofs restart
9. Login as the nisuser2001 or nisuser2002 on another terminal will be
Success.
According to question, RHCE domain is already configured. We have to make a client of RHCE domain and automatically mount the home directory on your system. To make a member of domain, we use the authconfig or system-config-authentication command. There a are lots of authentication server i.e NIS, LDAB, SMB etc. NIS is a RPC related Services, no need to configure the DNS, we should specify the NIS server address.
Here Automount feature is available. When user tried to login, home directory will automatically mount. The automount service used the /etc/auto.master file. On /etc/auto.master file we specified the mount point the configuration file for mount point.
Make Secondary belongs the jackie and curtin users on sysuser group. But david user should not belongs to sysuser group.
Answer and Explanation:
1.usermod -G sysuser jackie
2.usermod –G sysuser curtin
3.Verify by reading /etc/group file
Using usermod command we can make user belongs to different group. There are two types of group one primary and another is secondary. Primary group can be only one but user can belongs to more than one group as secondary.
usermod -g groupname username To change the primary group of the user
usermod -G groupname username To make user belongs to secondary group.
Install the Redhat Linux RHEL 4 through NFS. Where your Server is server1.example.com having IP 172.24.254.254 and shared /var/ftp/pub. The size of the partitions are listed below:
/1048
/home1028
/boot 512
/var 1028
/usr2048
Swap->1.5 of RAM Size
/archiveconfigure the RAID Level 0 of remaining all free space.
After completing the installation through NFS solve the following questions. There are two networks 172.24.0.0/16 and 172.25.0.0/16. As well as there are two domains example.com on 172.24.0.0/16 network and my133t.org on 172.25.0.0/16 network. Your system is based on example.com domain.
Answer and Explanation:
1. Insert the CD on CD-ROM and start the system.
2. In Boot: Prompt type linux askmethod
3. It will display the language, keyboard selection.
4. It will ask you for the installation method.
5. Select the NFS Image from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the NFS Server Name and Redhat Enterprise Linux Directory.
Specify the NFS Server: 172.24.254.254
Directory: /var/ftp/pub
8. After Connecting to the NFS Server Installation start in GUI. Go up to the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10.Create the two RAID partitions having equal size of remaining all free space.
11.Click on RAID button
12.Type mount point /archive
13.Select RAID Level 0
14.Click on ok
15. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
Create a RAID Device /dev/md0 by creating equal two disks from available free space on your harddisk and mount it on /data.
Answer and Explanation:
Redhat Enterprise Linux 5 Supports the RAID LEVEL 0, RAID LEVEL 1, RAID LEVEL 5 and RAID LEVEL 6 at installation time. You can create it at installation time later no need to type lots of commands for RAID.
At Installation Time:
viii.Click on ok
After Installation: We can create the RAID Device after Installation on command-line.
/dev/md0/dataext3defaults0 0