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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 votes1030 runs0 comment

List running processes.

DevOps
linux
processes
Kevin Lefevreat Sep 19, 2022
Hard
5 votes1056 runs1 comment

How to create a snapshot of a logical volume in Linux

DevOps
logical volume
snapshot
Kevin Lefevreat Nov 27, 2021
Easy
4 votes1034 runs0 comment

Change file mode bits.

DevOps
chmod
file
Kevin Lefevreat Nov 27, 2021
Hard
4 votes1021 runs0 comment

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

DevOps
kernel
parameters
Kevin Lefevreat Nov 27, 2021
Hard
3 votes1010 runs0 comment

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

DevOps
linux
password
Kevin Lefevreat Mar 6, 2023
Medium
2 votes1069 runs0 comment
Hard
2 votes1034 runs0 comment
Hard
2 votes1001 runs0 comment

What is the default configuration for a Linux system?

DevOps
linux
active-active
Kevin Lefevreat Nov 27, 2021
Medium
2 votes367 runs0 comment
Hard
1 vote1063 runs0 comment

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

DevOps
exit status
command
Kevin Lefevreat Nov 27, 2021
Medium
1 vote1062 runs0 comment
Medium
1 vote1037 runs0 comment

How to check if a file exists in Linux

DevOps
linux
system
Kevin Lefevreat Nov 27, 2021
Easy
1 vote1025 runs0 comment

What is the PATH environment variable?

DevOps
directories
path
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1020 runs0 comment
Hard
1 vote1010 runs0 comment

What is a cron job?

DevOps
crontab
batch
Kevin Lefevreat Nov 27, 2021
Hard
0 vote1044 runs0 comment

How to allow or deny access to a port in Linux

DevOps
linux
firewall
Kevin Lefevreat Dec 2, 2021
Hard
0 vote1030 runs0 comment
Hard
0 vote1021 runs0 comment