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23 interview questions on Linux Systemfor developers (2025)

Test your technical skills before an interview of Linux System with 23 corrected questions. Beginner, Intermediate or Expert level.

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23 questions
Easy
7 votes1005 runs0 comment

List running processes.

DevOps
linux
processes
Kevin Lefevreat Sep 19, 2022
Hard
5 votes1028 runs1 comment

How to create a snapshot of a logical volume in Linux

DevOps
logical volume
snapshot
Kevin Lefevreat Nov 27, 2021
Hard
4 votes993 runs0 comment

What are the parameters passed to the kernel at boot time?

DevOps
kernel
parameters
Kevin Lefevreat Nov 27, 2021
Easy
3 votes995 runs0 comment

Change file mode bits.

DevOps
chmod
file
Kevin Lefevreat Nov 27, 2021
Hard
3 votes983 runs0 comment

What does the `-p` option do in `passwd` command?

DevOps
linux
password
Kevin Lefevreat Mar 6, 2023
Medium
2 votes1042 runs0 comment
Hard
2 votes1003 runs0 comment
Hard
2 votes974 runs0 comment

What is the default configuration for a Linux system?

DevOps
linux
active-active
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1033 runs0 comment

What is the output of the following command? echo $?

DevOps
exit status
command
Kevin Lefevreat Nov 27, 2021
Medium
1 vote1008 runs0 comment

How to check if a file exists in Linux

DevOps
linux
system
Kevin Lefevreat Nov 27, 2021
Hard
1 vote994 runs0 comment
Easy
1 vote994 runs0 comment

What is the PATH environment variable?

DevOps
directories
path
Kevin Lefevreat Nov 27, 2021
Hard
1 vote980 runs0 comment

What is a cron job?

DevOps
crontab
batch
Kevin Lefevreat Nov 27, 2021
Medium
1 vote344 runs0 comment
Medium
0 vote1036 runs0 comment
Hard
0 vote1012 runs0 comment

How to allow or deny access to a port in Linux

DevOps
linux
firewall
Kevin Lefevreat Dec 2, 2021
Hard
0 vote1001 runs0 comment
Hard
0 vote996 runs0 comment