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30 interview questions on Linuxfor developers (2026)

Test your technical skills before an interview of Linux with 30 corrected questions. Beginner, Intermediate or Expert level.

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30 questions
Hard
7 votes1190 runs1 comment

How to create a snapshot of a logical volume in Linux

DevOps
logical volume
snapshot
Kevin Lefevreat Nov 27, 2021
Easy
7 votes1153 runs0 comment

List running processes.

DevOps
linux
processes
Kevin Lefevreat Sep 19, 2022
Hard
7 votes1138 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
Easy
5 votes1170 runs0 comment

Change file mode bits.

DevOps
chmod
file
Kevin Lefevreat Nov 27, 2021
Hard
4 votes1149 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
4 votes1147 runs0 comment

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

DevOps
kernel
parameters
Kevin Lefevreat Nov 27, 2021
Hard
4 votes1141 runs0 comment

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

DevOps
linux
password
Kevin Lefevreat Mar 6, 2023
Hard
3 votes1160 runs0 comment

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

DevOps
linux
command
Kevin Lefevreat Dec 2, 2021
Medium
2 votes1196 runs0 comment

Where is the shadow file located in a Linux system?

DevOps
linux
file
Kevin Lefevreat Nov 27, 2021
Hard
2 votes1191 runs0 comment

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

DevOps
exit status
command
Kevin Lefevreat Nov 27, 2021
Easy
2 votes1151 runs0 comment

What is the PATH environment variable?

DevOps
directories
path
Kevin Lefevreat Nov 27, 2021
Hard
2 votes1125 runs0 comment

What is the default configuration for a Linux system?

DevOps
linux
active-active
Kevin Lefevreat Nov 27, 2021
Medium
2 votes442 runs0 comment

How to run a process in background in Linux

DevOps
background
process
Lebelat Nov 6, 2023
Hard
1 vote1201 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
Medium
1 vote1160 runs0 comment

How to check if a file exists in Linux

DevOps
linux
system
Kevin Lefevreat Nov 27, 2021
Hard
1 vote1154 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 vote1151 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
Medium
1 vote363 runs0 comment

In which configuration file can the user shell be set ?

DevOps
William Meadat Jan 19, 2024
Hard
0 vote1180 runs0 comment

How to allow or deny access to a port in Linux

DevOps
linux
firewall
Kevin Lefevreat Dec 2, 2021
Hard
0 vote1155 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