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23 interview questions on Linuxfor developers (2025)

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

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Easy
7 votes1074 runs0 comment

List running processes.

DevOps
linux
processes
Kevin Lefevreat Sep 19, 2022
Hard
7 votes1057 runs1 comment

Configure the /etc/resolv.conf file to use the following nameservers: 10.1.1.1, 10.2.2.2, 10.3.3.3.

DevOps
linux
resolver
Kevin Lefevreat Jan 2, 2024
Hard
6 votes1103 runs1 comment

How to create a snapshot of a logical volume in Linux

DevOps
logical volume
snapshot
Kevin Lefevreat Nov 27, 2021
Easy
4 votes1086 runs0 comment

Change file mode bits.

DevOps
chmod
file
Kevin Lefevreat Nov 27, 2021
Hard
4 votes1066 runs0 comment

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

DevOps
kernel
parameters
Kevin Lefevreat Nov 27, 2021
Hard
3 votes1064 runs1 comment

Change file permission of /home/strawberry/.ssh/authorized_keys to 600,Change file permission of /home/strawberry/ to 755

DevOps
linux
file permissions
Clément Devos (W3D Team)at Nov 27, 2021
Hard
3 votes1056 runs0 comment

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

DevOps
linux
password
Kevin Lefevreat Mar 6, 2023
Medium
2 votes1110 runs0 comment

Where is the shadow file located in a Linux system?

DevOps
linux
file
Kevin Lefevreat Nov 27, 2021
Hard
2 votes1077 runs0 comment

What is the default number of processes in a Linux system?

DevOps
linux
command
Kevin Lefevreat Dec 2, 2021
Hard
2 votes1046 runs0 comment

What is the default configuration for a Linux system?

DevOps
linux
active-active
Kevin Lefevreat Nov 27, 2021
Medium
2 votes402 runs0 comment

How to run a process in background in Linux

DevOps
background
process
Lebelat Nov 6, 2023
Hard
1 vote1110 runs0 comment

What is the name of the routing protocol that uses a single IP address to reach multiple destinations?

DevOps
networking
routing
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1107 runs0 comment

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

DevOps
exit status
command
Kevin Lefevreat Nov 27, 2021
Medium
1 vote1081 runs0 comment

How to check if a file exists in Linux

DevOps
linux
system
Kevin Lefevreat Nov 27, 2021
Easy
1 vote1067 runs0 comment

What is the PATH environment variable?

DevOps
directories
path
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1066 runs0 comment

Find the path of the first partition of the disk with the device name 'sda'

DevOps
linux
disk
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1065 runs0 comment

What is the output of the following command? `ls -l /dev/sda1 | awk '{print $5}'`

DevOps
linux
system
Kevin Lefevreat Nov 27, 2021
Hard
1 vote323 runs0 comment

In which configuration file can the user shell be set ?

DevOps
William Meadat Jan 19, 2024
Hard
0 vote1094 runs0 comment

How to allow or deny access to a port in Linux

DevOps
linux
firewall
Kevin Lefevreat Dec 2, 2021
Hard
0 vote1072 runs0 comment

Capture all packets from 10.10.10.10's port 53 to host 172.16.0.1 on interface eth0.

DevOps
tcpdump
ip address
hostname
Kevin Lefevreat Nov 27, 2021