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2021 Mar RH302 test question

Q11. CORRECT TEXT

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

/boot 200

/home 1000

/var 1000

/usr 4000

swap 2X256 (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.

Q12. CORRECT TEXT

Boot your System Successfully on runlevel 3.

Answer and Explanation:

This is boot related problem. There will be same questions repeated two times but problem is different.

First When you restart the system you will get the Error:

File Not Found

mount: error 15 mounting ext3

mount: error 2 mounting none

switchroot: mount failed: 22

umount /initrd/dev/: 2

Kernel Panic: no syncing: Attempted to kill init !

This error occurred in your system before showing welcome redhat linux. That means problem in grub boot loader.

Restart the System

Check the grub boot loader configuration by pressing e shortcut key.

You will see like:

root (hd0,0)

kernel /vmlinuz-2.6.9-5.EL ro root= / rhgb quiet

initrd /initrd-2.6.9-5.EL.img

root (hd0,0)

kernel /vmlinuz-2.6.9-5.EL ro root=LABEL=/root rhgb quiet

initrd /initrd-2.6.9-5.EL.img

Then Edit Boot loader to make like

root (hd0,0)

kernel /vmlinuz-2.6.9-5.EL ro root=LABEL=/ rhgb quiet

initrd /initrd-2.6.9-5.EL.img

Check all lines and edit as same as above. Press b to boot the system

After booting the system you should correct the /etc/grub.conf file.

If still you are getting Error like File not found, it seems that either kernel file or initrd file is missing.

To troubleshoot with these problem, boot the system on rescue mode.

v. linux rescue

vi. chroot /mnt/sysimage

vii. Check the files on /boot, if not available install the kernel package from ftp or nfs server

viii. Create the initrd image file on boot using: mkinitrd initrd-2.6.9-5.EL.img `uname -r`

Q13. CORRECT TEXT

Configure the web server for www.abc.com associated IP address is 192.100.0.1 by allowing access to user5 and user6 httpusers.

Answer and Explanation:

1. vi /etc/httpd/conf/httpd.conf

ServerName www.abc.com

DocumentRoot /var/www/abc/

AllowOverride authconfig

</Directory>

DirectoryIndex index.html

ServerAdmin webmaster@abc.com

ErrorLog logs/error_abc.logs

CustomLog logs/custom_abc.logs common

</VirtualHost>

2. Create the directory and index page on specified path. (Index page can download from

ftp://server1.example.com at exam time)

Check the SELinux context of index.html file, should be like this:

-rw-r--r-- root root system_u:object_r:httpd_sys_content_t /var/www/html/index.html

If SELinux Context is mismatched, use the restorecon -R /var command

3. vi /var/www/abc/.htaccess

AuthName "Only to Authorized Users"

AuthType basic

AuthUserFile /etc/httpd/conf/mypasswd

require valid-user

Check the SELinux Context, should like this:

-rw-r--r-- root root root:object_r:httpd_sys_content_t .htaccess

htpasswd -c /etc/httpd/conf/mypasswd user5htpasswd -m /etc/httpd/conf/mypasswd user6chgrp

apache /etc/httpd/conf/mypasswdchmod g+r /etc/httpd/conf/mypasswd

Check the SELinux Context, should like this:

-rw-r--r-- root root system_u:object_r:httpd_config_t /etc/httpd/conf/mypasswd

Use restorecon command to restore the mismatched SELinux Context of the file.service httpd

restartchkconfig httpd on

AllowOverride Authconfig is used to specify which and how much configuration can be overridden by directory specific .htaccess files.

One of the most common tasks performed in users' .htaccess files is adding authorization.

Typically, a user will setup authorization for directories that hold sensitive information with a configuration.

Q14. CORRECT TEXT

One New Kernel is released named kernel-.2.6.19-11. Kernel is available on ftp://server1.example.com/pub/updates directory for anonymous. Install the Kernel and make the kernel-2.6.18-8 default.

Answer and Explanation:

1. rpm -ivh ftp://server1.example.com/pub/updates/kernel-2.6.19-11.i686.rpm

2. vi /etc/grub.conf

default=1 à Change this value to 1

timeout=5

splashimage=(hd0,0)/grub/splash.xpm.gz

hiddenmenu

title Red Hat Enterprise Linux ES (2.6.19-11)

root (hd0,0)

kernel /vmlinuz-2.6.19-11.EL ro root=LABEL=/ rhgb quiet

initrd /initrd-2.6.19-11.EL.img

title Red Hat Enterprise Linux ES (2.6.9-5.EL)

root (hd0,0)

kernel /vmlinuz-2.6.9-5.EL ro root=LABEL=/ rhgb quiet

initrd /initrd-2.6.9-5.EL.img

According question that kernel is available to anonymous user. You can directly install from the ftp server using rpm command.

When you install the kernel, it will write on /etc/grub.conf file. You can set the default kernel by changing the default value. See on the output of /etc/grub.conf file that new kernel is on first title so it's index is 0 and previous kernel's index is 1.

Q15. CORRECT TEXT

Add a job on Cron schedule to display Hello World on every two Seconds in terminal 8.

Answer and Explanation:cat >schedule

*/2 * * * * /bin/echo "Hello World" >/dev/tty8crontab scheduleVerify using: crontab -lservice crond restart

Cron helps to schedule on recurring events. Pattern of Cron is:

Minute Hour Day of Month Month Day of Week Commands

0-59 0-23 1-31 1-12 0-7 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

Up to the minute RH302 download:

Q16. CORRECT TEXT

You are the administrator of example.com domain. Configure to deny local login to all normal users on your domain server. As well as allow to root login only on First Terminal.

Answer and Explanation:

1. touch /etc/nologin

2. vi /etc/securetty

comment all available terminall then first.

If /etc/nologin file is created, then pam modules pan_nologin deny to all non-root users to login locally.

/etc/pam.d/login file calls the module.

#%PAM-1.0

auth required pam_securetty.so

auth required pam_stack.so service=system-auth

auth required pam_nologin.so

account required pam_stack.so service=system-auth

password required pam_stack.so service=system-auth

# pam_selinux.so close should be the first session rule

session required pam_selinux.so close

session required pam_stack.so service=system-auth

session optional pam_console.so

# pam_selinux.so open should be the last session rule

session required pam_selinux.so multiple open

pam_securetty modules checks the /etc/securetty file, which terminal are available to root. If terminal is not available in this file then pam_securetty module deny to login on unavailable terminal to root user.

Q17. CORRECT TEXT

Install the Cron Schedule for jeff user to display "Hello" on daily 5:30.

Answer and Explanation:

30 05 * * * /bin/echo "Hello"

3. crontab -u jeff schedule.txt

4. service crond restart

The cron system is essentially a smart alarm clock. When the alarm sounds, Linux runs the commands of your choice automatically. You can set the alarm clock to run at all sorts of regular time intervals. Alternatively, the at system allows you to run the command of your choice once, at a specified time in the future.

Red Hat configured the cron daemon, crond. By default, it checks a series of directories for jobs to run, every minute of every hour of every day. The crond checks the /var/spool/cron directory for jobs by user. It also checks for scheduled jobs for the computer under /etc/crontab and in the /etc/cron.d directory.

Here is the format of a line in crontab. Each of these columns is explained in more detail:

#minute, hour, day of month, month, day of week, command

* * * * * command

Q18. CORRECT TEXT

Your Local Domain is example.com. Configure the send mail server for you local LAN.

Answer and Explanation:

1. vi /etc/mail/local-host-names

example.com

2. vi /etc/mail/sendmail.mc

dnl # DEAMON_OPTIONS(`Port=smtp,Addr=127.0.0.1,Name=MTA`)dnl

3. m4 /etc/mail/sendmail.mc >/etc/mail/sendmail.cf

4. vi /etc/mail/access

example.com RELAY

192.168.0 RELAY

5. service sendmail start | restart

6. chkconfig sendmail on

/etc/mail/local-host-names file contains the aliases to hostname. Mail server program reads the

/etc/mail/sendmail.cf. To change the configuration on mail server, we should edit the

/etc/mail/sendmail.mc file and should generate the sendmail.cf using m4 command.

By default sendmail server allows to connect to local host only. So we should edit the

/etc/mail/sendmail.mc file to allow connect to other hosts.

By default sendmail server will not forward mail. we should specify on /etc/mail/access to relay or to block mail coming from domain or network or individual email address.

Q19. CORRECT TEXT

There are three Disk Partitions /dev/hda8, /dev/hda9, /dev/hda10 having size 100MB of each partition. Create a Logical Volume named testvolume1 and testvolume2 having a size 250MB.

Mount each Logical Volume on lvmtest1, lvmtest2 directory.

Answer and Explanation:

Steps of Creating LVM:

1. pvcreate /dev/hda8 /dev/hda9 /dev/hda10

àpvdisplay command is used to display the information of physical volume.

2. vgceate test0 /dev/hda8 /dev/hda9 /dev/hda10

àvgdisplay command is used to display the information of Volume Group.

3. lvcreate -L 250M -n testvolume1 test0

à lvdisplay command is used to display the information of Logical Volume.

4. lvcreate -L 250M -n testvolume2 test0

5. mkfs -t ext3 /dev/test0/testvolume1

6. mkfs -t ext3 /dev/test0/testvolume2

7. mkdir /lvtest1

8. mkdir /lvtest2

9. mount /dev/test0/testvolume1 /lvtest1

10. mount /dev/test0/testvolume2 /lvtest2

11. vi /etc/fstab

/dev/test0/testvolume2 /lvtest2 ext3 defaults 0 0

/dev/test0/testvolume1 /lvtest1 ext3 defaults 0 0

To create the LVM( Logical Volume Manager) we required the disks having '8e' Linux LVM type.

First we should create the physical Volume, then we can create the Volume group from disks belongs to physical Volume. lvcreate command is used to create the logical volume on volume group. We can specify the size of logical volume with -L option and name with -n option.

Q20. CORRECT TEXT

Your System is going to use as a Router for two networks. One Network is 192.168.0.0/24 and Another Network is 192.168.1.0/24. Both network's IP address has assigned. How will you forward the packets from one network to another network?

Answer and Explanation:

1. echo "1" >/proc/sys/net/ipv4/ip_forward

2. vi /etc/sysctl.conf

net.ipv4.ip_forward = 1

If you want to use the Linux System as a Router to make communication between different networks, you need enable the IP forwarding. To enable on running session just set value 1 to /proc/sys/net/ipv4/ip_forward. As well as automatically turn on the IP forwarding features on next boot set on /etc/sysctl.conf file.

2021 Mar RH302 test question

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