Linux - Linux System Admin Interview Questions & Answers - Part 1

Linux System Admin Interview Questions & Answers - Part 1

1 - How To check the uptime of a Linux Server ?

Using uptime command we can determine how long a linux box has been running , also uptime can be viewed by the top & w command.

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2 - How to check which Redhat version is installed on Server ?


Ans: Use the command cat /etc/redhat-release , output of this command will tell you the redhat version.

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3 - How to install rpm packages in Redhat & CentOS linux ?

Ans: rpm and yum command are used to install packages in redhat linux and CentOS.

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4 - How to determine the hostname of a linux box ?
Ans: On typing the hostname command on terminal we can determine the hostname of a linux server.

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5 - How To check the default gatway ?
Ans: Using ‘route -n’ command we can determine the default gateway in linux.

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6 - Which Command is used to check the kernel Version ?

Ans: ‘uname -r’

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7 - How to check the current runlevel of a linux box ?

Ans : ‘who -r’ and ‘runlevel’ , both of these command are used to find current run level.

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8 - What is Initrd ?

Ans: Initrd stands for initial ram disk , which contains the temporary root filesystem and neccessary modules which helps in mounting the real root filesystem in read mode only.

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9 - What is Bootloader ?

Ans: Bootloader is a program that boots the operating system and decides from which kernel OS will boot.

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10 - How to list hidden files from the command line ?

Ans: ‘ls -a’ <Folder_Name>

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11 - What is soft link ?

Ans: Soft link is a method to create short cuts in linux. It is similar to windows short cut feature.

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12 - How to create a blank file in linux from command line ?

Ans: Using the command ‘touch <file-name>’

13 - How To change the password of user from the Command Line ?

Ans: ‘passwd <User-Name>’

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14 - What is name of first process in linux ?

Ans: ‘init’ is the first process in linux which is started by kernel and whose pid is 1.

15 - How to check  what is your current working shell ?

Ans : echo $SHELL and ‘/etc/passwd’ will tell you your default shell.


Credits : LinuxTechi 
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