RedHat RHCE certification EX300 Questions & Answers

• Question 31:

  SIMULATION

  One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 400MB. Make successfully that the size of Logical Volume 200MB without losing any data. The size of logical volume 200MB to 210MB will be acceptable.

  Correct Answer: Please see explanation

  Explanation:

  

• Question 32:

  SIMULATION

  You are giving RHCE exam. Examiner gave you the Boot related problem and told to you that make successfully boot the System. When you started the system, System automatically asking the root password for maintenance. How will you fix that problem?

  Correct Answer: Please see explanation

  Explanation:

  Maintenance mode also known as emergency mode. System boots on emergency mode when file system error occurred. It is due to unknown partition, bad filesystem specified in /etc/fstab. To solve follow the steps:

  

• Question 33:

  SIMULATION

  You are working as an Administrator. There is a common data shared (/data) from 192.168.0.254 to all users in your local LAN. When user's system start, shared data should automatically mount on /common directory.

  Correct Answer: Please see explanation

  Explanation:

  To automatically mount at boot time, we use the /etc/fstab file. Because /etc/rc.d/rc.sysinit file reads and mounts all file system specified in /etc/fstab. To mount Network Sharing Files also use the /etc/fstab but filesystem is nfs.

  

• Question 34:

  SIMULATION Create the group named sysusers.

  Correct Answer: Please see explanation

  Explanation: 1. groupadd sysusers groupadd command is used to create the group and all group information is stored in /etc/group file.

• Question 35:

  SIMULATION

  Create the users named jeff, marion, harold

  Correct Answer: Please see explanation

  Explanation:

  1.

  useradd jeff

  2.

  useradd marion

  3.

  useradd harold

  Note:

  useradd command is used to create the user.

  All user's information stores in /etc/passwd and user's shadow password stores in /etc/shadow.

• Question 36:

  SIMULATION

  Make Secondary belongs the jeff and marion users on sysusers group. But harold user should not belongs to sysusers group.

  Correct Answer: Please see explanation

  Explanation:

  1.

  usermod -G sysusers jeff

  2.

  usermod -G sysuser marion

  3.

  Verify by reading /etc/group file

  Note:

  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 belong 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.

• Question 37:

  SIMULATION

  Create the directory /storage and group owner should be the sysusers group.

  Correct Answer: Please see explanation

  Explanation:

  chgrp sysusers /storage

  Verify using ls -ld /storage command.

  You should get like drwxr-x--- 2 root sysusers 4096 Mar 16 17:59 /storage chgrp command is used to

  change the group ownership of particular files or directory.

  Another way you can use the chown command.

  chown root:sysusers /storage

• Question 38:

  SIMULATION

  Configure the kernel parameters: rhelblq=1, and it is requested that your kernel parameters can be verified through /proc/cmdline.

  Correct Answer: Please see explanation

  Explanation:

  

• Question 39:

  SIMULATION

  Configure cron and don't allow the user tom to use.

  Correct Answer: Please see explanation

  Explanation:

  

• Question 40:

  SIMULATION

  Write a script /root/program. The request is when you input the kernel parameters for script, the script should return to user. When input the user parameters, the script should return to kernel. And when the script has no parameters or the parameters are wrong, the standard error output should be “usage:/root/ program kernel|user”.

  Correct Answer: Please see explanation

  Explanation: