Red-Hat RH302 Free Practice Questions

Q1. CORRECT TEXT

Deny to john user login locally.

Answer and Explanation:

1. vi /etc/security/access.conf

-:john:LOCAL

2. vi /etc/pam.d/system-auth

account required /lib/security/pam_access.so

/etc/security/access.conf file helps to allow or deny login to users on the basis of origin.

Syntax of /etc/security/access.conf

permission : users : origins

The first field should be a "+" (access granted) or "-" (access denied) character.

The second field should be a list of one or more login names, group names, or ALL (always matches). A pattern of the form user@host is matched when the login name matches the "user" part, and when the "host" part matches the local machine name.

The third field should be a list of one or more tty names (for non-networked logins), host names, domain names (begin with "."), host addresses, internet network numbers (end with "."), ALL (always matches) or LOCAL (matches any string that does not contain a "." character).

In our example denied to john user to login locally.

Q2. CORRECT TEXT

We are working on /data initially the size is 2GB. The /dev/test0/lvtestvolume is mount on /data.

Now you required more space on /data but you already added all disks belong to physical volume.

You saw that you have unallocated space around 5 GB on your harddisk. Increase the size of lvtestvolume by 5GB.

Answer and Explanation:.

1. Create a partition having size 5 GB and change the syste id '8e'.

2. use partprobe command

3. pvcreate /dev/hda9 à Suppose your partition number is hda9.

4. vgextend test0 /dev/hda9 à vgextend command add the physical disk on volume group.

5. lvextend -L+5120M /dev/test0/lvtestvolume

6. verify using lvdisplay /dev/test0/lvtestvolume.

Q3. 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.

Q4. CORRECT TEXT

Raw (Model) printer named printer1 is installed and shared on 192.168.0.254. You should install the shared printer on your PC to connect shared printer using IPP Protocols.

Answer and Explanation:

IPP( Internet Printing Protocol), allows administrator to manage printer through browser so CUPS is called Internet Printing Protocol based on HTTP. We can Install the printer either through:

system-confing-printer tool or through Browser.

1. Open the browser and Type on address: http://localhost:631 àCUPS (Common Unix Printing System) used the IPP protocol. CUPS use the 631 port.

2. Click on Manage Printer.

3. Click on Add Printer.

4. Type Printer name, Location, Description.

5. Select Device for bb. (Select IPP).

6. Device URL: ipp://192.168.0.254/ipp/ queue name àSame printer name of shared printer.

7. Select Model/Driver RAW printer.

8. service cups restart

Q5. CORRECT TEXT

There are two different networks, 192.168.0.0/24 and 192.168.1.0/24. Your System is in 192.168.0.0/24 Network. One RHEL 4 Installed System is going to use as a Router. All required configuration is already done on Linux Server. Where 192.168.0.254 and 192.168.1.254 IP Address are assigned on that Server. How will make successfully ping to 192.168.1.0/24 Network's Host?

Answer and Explanation:

1. vi /etc/sysconfig/network

GATEWAY=192.168.0.254

OR

vi /etc/sysconf/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=192.168.0.?

NETMASK=255.255.255.0

GATEWAY=192.168.0.254

2. service network restart

Q6. CORRECT TEXT

Make sure on /data that only the owner user can remove files/directories.

Answer and Explanation:

By default user1 can remove user2's files due to directory permission to group member. We can prevent of deleting files from others users using Sticky Bits.chmod o+t /dataVerify /data: ls –ld /data

You will get: drwxrwx-T

Q7. CORRECT TEXT

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:

/ 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 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.

Q8. CORRECT TEXT

One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 124MB. Make successfully that the size of Logical Volume 245MB without losing any data. The size of logical volume 240MB to 255MB will be acceptable.

Answer and Explanation:

1. First check the size of Logical Volume: lvdisplay /dev/vo/myvol

2. Increase the Size of Logical Volume: lvextend -L+121M /dev/vo/myvol

3. Make Available the size on online: ext2online /dev/vo/myvol

4. Verify the Size of Logical Volume: lvdisplay /dev/vo/myvol

5. Verify that the size comes in online or not: df -h

We can extend the size of logical Volume using the lvextend command. As well as to decrease the size of Logical Volume, use the lvresize command. In LVM v2 we can extend the size of Logical Volume without unmount as well as we can bring the size of Logical Volume on online using ext2online command.

Q9. CORRECT TEXT

One Logical Volume named lv1 is created under vg0. The Initial Size of that Logical Volume is 100MB. Now you required the size 500MB. Make successfully the size of that Logical Volume 500M without losing any data. As well as size should be increased online.

Answer and Explanation:

The LVM system organizes hard disks into Logical Volume (LV) groups. Essentially, physical hard disk partitions (or possibly RAID arrays) are set up in a bunch of equal-sized chunks known as Physical Extents (PE). As there are several other concepts associated with the LVM system, let's start with some basic definitions:

* Physical Volume (PV) is the standard partition that you add to the LVM mix. Normally, a physical volume is a standard primary or logical partition. It can also be a RAID array.

* Physical Extent (PE) is a chunk of disk space. Every PV is divided into a number of equal sized PEs. Every PE in a LV group is the same size. Different LV groups can have different sized PEs.

* Logical Extent (LE) is also a chunk of disk space. Every LE is mapped to a specific PE.

* Logical Volume (LV) is composed of a group of LEs. You can mount a filesystem such as /home and /var on an LV.

* Volume Group (VG) is composed of a group of LVs. It is the organizational group for LVM. Most of the commands that you'll use apply to a specific VG.

1. Verify the size of Logical Volume: lvdisplay /dev/vg0/lv1

2. Verify the Size on mounted directory: df -h or df -h mounted directory name

3. Use : lvextend -L+400M /dev/vg0/lv1

4. resize2fs /dev/vg0/lv1 à to bring extended size online.

5. Again Verify using lvdisplay and df -h command.

Q10. CORRECT TEXT

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:

Use fdisk /dev/hda à To create new partition.Type n à For New

partitionsIt will ask for Logical or Primary Partitions. Press l for logical.It will ask for the Starting

Cylinder: Use the Default by pressing Enter Key.Type the Size: +100M à You can Specify either

Last cylinder of Size here.Press P to verify the partitions lists and remember the partitions

name.Press w to write on partitions table.Either Reboot or use partprobe command.Use mkfs -t

ext3 /dev/hda?Ormke2fs -j /dev/hda? à To create ext3 filesystem.vi /etc/fstabWrite:/dev/hda? /data

ext3 defaults 0 0Verify by mounting on current Sessions also:mount /dev/hda? /data

Q11. CORRECT TEXT

You are working as a System Administrator at Certkiller. 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.

Q12. CORRECT TEXT

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.

Q13. CORRECT TEXT

There is a FTP server 192.168.0.254 and all required packages are dumped in /var/ftp/pub of that server and anonymous login is enabled. Install the Redhat Enterprise Linux 5 as an anonymous 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 FTP 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 FTP site name and Redhat Enterprise Linux Directory.

Specify the FTP Server: 192.168.0.254

Directory: pub à Because anonymous login on /var/ftp.

8. After Connecting to the FTP Server Installation will start. 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 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.

Q14. CORRECT TEXT

There is one partition /dev/hda14 mounted on /data. The owner of /data is root user and root group. And Permission is full to owner user, read and execute to group member and no permission to others. Now you should give the full permission to user user1 without changing pervious permission.

Answer and Explanation:

We know that every files/directories are owned by certain user and group. And Permissions are defines to owner user, owner group and other.

-rwxr-x--- àFull permission to owner user, read and write to owner group and no permission to others.

According to question: We should give the full permission to user user1 without changing the previous permission.

ACL (Access Control List), in ext3 file system we can give permission to certain user and certain group without changing previous permission. But that partition should mount using acl option.

Follow the stepsvi /etc/fstab

/dev/hda14 /data ext3 defaults,acl 0 1Either Reboot or use: mount -o remount /datasetfacl -m

u:user1:rwx /dataVerify using: getfacl /data

Q15. CORRECT TEXT

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:Create the partitions using diskdruid.Create the Partitions having File system

Type Software RAID.Click on RAID buttonType the Mount PointSelect File system typeSelect

RAID LevelSelect Partitions/disks as a member of RAID.Click on ok

After Installation: We can create the RAID Device after Installation on command-line.

1. Create the Two partitions having equal size. (Specify the Size using Cylinder, find the remaining cylinder and divide by 2).

2. Change the Partition ID to fd (Linux raid Autodetect) by typing t.

3. Type w à To write on partitions table.

4. Use partprobe command to synchronic the partition table.

5. Use: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hda? /dev/hda?

6. Verify the RAID: mdadm --detail /dev/md0

7. mkfs -t ext3 /dev/md0

8. mount /dev/md0 /data

9. vi /etc/fstab

/dev/md0 /data ext3 defaults 0 0

10. Verify mounting devices using mount command.