RH302 Exam
Up to the immediate present RH302: Exambible real resource from 11 to 20
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2021 Apr RH302 test engine
Q11. CORRECT TEXT
There are more then 400 Computers in your Office. You are appointed as a System Administrator.
But you don't have Router. So, you are going to use your One Linux Server as a Router. How will you enable IP packets forward?
Answer and Explanation:
1. /proc is the virtual filesystem, we use /proc to modify the kernel parameters at running time.
# echo "1" >/proc/sys/net/ipv4/ip_forward
2. /etc/sysctl.conf à when System Reboot on next time, /etc/rc.d/rc.sysinit scripts reads the file /etc/sysctl.conf. To enable the IP forwarding on next reboot also you need to set the parameter.
net.ipv4.ip_forward=1
Here 0 means disable, 1 means enable.
Q12. CORRECT TEXT
Your System is going use as a router for 172.24.0.0/16 and 172.25.0.0/16. Enable the IP Forwarding.
i. echo "1" >/proc/sys/net/ipv4/ip_forward
ii. vi /etc/sysctl.conf
net.ipv4.ip_forward=1
/proc is the virtual filesystem, containing the information about the running kernel. To change the parameter of running kernel in running state you should modify the /proc. From Next boot the system, kernel will take the value from /etc/sysctl.conf. If net.ipv4.ip_forward is 0, it disable the IP forwarding, if 1 then it enable the IP Forwarding.
Q13. CORRECT TEXT
Install the Redhat Linux RHEL 4 through NFS. Where your Server is server1.example.com having IP 192.168.0.254 and shared /var/ftp/pub. The size of the partitions are listed below:
/ à 1048
/home à 1028
/boot à 512
/var à 1028
/usr à 2048
Swap -> 1.5 of RAM Size
/data à configure the RAID Level 0 of remaining all free space.
After completing the installation through NFS solve the following questions. There are two networks 192.168.0.0/24 and 192.168.1.0/24. As well as there are two domains example.com on 192.168.0.0/24 network and cracker.org on 192.168.1.0/24 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: 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. 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.
Q14. CORRECT TEXT
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.
7. Restart the System.
8. You will get the boot loader GRUB screen.
9. Press a and type 1 or s for single mode
ro root=LABEL=/ rhgb queit s
10. System will boot on Single User mode.
11. Use passwd command to change.
12. Press ctrl+d
Q15. CORRECT TEXT
Create the user named eric and deny to interactive login.
Answer and Explanation:
1. useradd eric
2. passwd eric
3. vi /etc/passwd
4. eric:x:505:505::/home/eric:/sbin/nologin
Which shell or program should start at login time is specified in /etc/passwd file. By default Redhat Enterprise Linux assigns the /bin/bash shell to the users. To deny the interactive login, you should write /sbin/nologin or /bin/false instead of login shell.
Latest RH302 answers:
Q16. CORRECT TEXT
Share the /data directory only to example.com members. These hosts should get read and write access on shared directory.
Answer and Explanation:
1. vi /etc/exports
/data *.example.com(rw,sync)
2. service nfs start
3. service portmap restart
4. chkconfig nfs on
5. chkconfig portmap on
In Linux to share the data we use the /etc/exports file. Pattern is:
Path client(permission)
Shared Directory Path, Client can be single host or domain name or ip address. Permission should specify without space with client lists in parentheses.
Q17. CORRECT TEXT
/data Directory is shared from the server1.example.com server. Mount the shared directory that:
a. when user try to access, automatically should mount
b. when user doesn't use mounted directory should unmount automatically after 50 seconds.
c. Shared directory should mount on /mnt/data on your machine.
Answer and Explanation:
1. vi /etc/auto.master
/mnt /etc/auto.misc --timeout=50
2. vi /etc/auto.misc
3. data -rw,soft,intr server1.example.com:/data
4. service autofs restart
5. chkconfig autofs on
When you mount the other filesystem, you should unmount the mounted filesystem, Automount feature of linux helps to mount at access time and after certain seconds, when user unaccess the mounted directory, automatically unmount the filesystem.
/etc/auto.master is the master configuration file for autofs service. When you start the service, it reads the mount point as defined in /etc/auto.master.
Q18. CORRECT TEXT
Create the directory /archive and group owner should be the sysuser group.
Answer and Explanation:
1. chgrp sysuser /archive
2. Verify using ls -ld /archive command. You should get like
drwxr-x--- 2 root sysadmin 4096 Mar 16 17:59 /archive
chgrp command is used to change the group ownership of particular files or directory.
Another way you can use the chown command.
chown root:sysuser /archive
Q19. CORRECT TEXT
Create the partition having 100MB size and mount it on /mnt/neo
Answer and Explanation:
1. Use fdisk /dev/hda à To create new partition.
2. Type n à For New partitions
3. It will ask for Logical or Primary Partitions. Press l for logical.
4. It will ask for the Starting Cylinder: Use the Default by pressing Enter Key.
5. Type the Size: +100M à You can Specify either Last cylinder of Size here.
6. Press P to verify the partitions lists and remember the partitions name.
7. Press w to write on partitions table.
8. Either Reboot or use partprobe command.
9. Use mkfs -t ext3 /dev/hda? Where ? is your partition number
10. Or
11. mke2fs -j /dev/hda? à To create ext3 filesystem.
12. mkdir /mnt/neo
13. vi /etc/fstab
14. Write:
15. /dev/hda? /mnt/neo ext3 defaults 1 2
16. Verify by mounting on current Sessions also:
17. mount /dev/hda? /mnt/neo
Q20. CORRECT TEXT
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.