Linux Interview Questions and Answers in 2025 (100+ Q&A)

Database Architect/ Designer Linux

Ques:- Which of the following lines in your /etc/syslog.conf file will cause all critical messages to be logged to the file /var/log/critmessages?Choose one:a. *.=crit /var/log/critmessagesb. *crit /var/lo

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Right Answer:
a. *.=crit /var/log/critmessages

Linux Software Developer/ Programmer

Ques:- Bob has created a new directory that will contain files that he and seven other users will be using for a new project. These eight users are the only members of the kickoff group. What does Bob need to do to give these users access to these files.Choose o

Asked In :- GlobalSCAPE,

Database Architect/ Designer Linux

Ques:- What would be the result of the command paste -s dog cat?Choose one:a. The corresponding lines from the files dog and cat would be pasted together separated by a tab.b. The corresponding lines from the files dog and cat would be pasted together separated

Asked In :- Schneider Electric India, Acturis, EncoreSky Technologies, psiog digital,

Linux Software Developer/ Programmer

Ques:- You are using tar to create a tarfile of the files contained in the /home/bob/memos directory. After making the /home/bob/memos directory your working directory, which of the following commands will create the file?Choose one:a. tar cf memos.tar .b. tar x

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Database Administrator (dba) Linux

Ques:- When is the most important time to restore a file from your backup?Choose onea. On a regular scheduled basis to verify that the data is available.b. When the system crashes.c. When a user inadvertently loses a file.d. When your boss asks to see how restor

Asked In :- valuemomentum, accion labs, dashlane,

Linux Web Designer

Ques:- You want to ensure that your system is not overloaded with users running multiple scheduled jobs. A policy has been established that only the system administrators can create any scheduled jobs. It is your job to implement this policy. How are you going t

Asked In :- IMEG, Connect Direct, TalentServ Consulting, episerver, mitratech,

Database Architect/ Designer Linux

Ques:- When defining a cronjob, there are five fields used to specify when the job will run. What are these fields and what is the correct order?Choose one:a. minute, hour, day of week, day of month, monthb. minute, hour, month, day of month, day of weekc. minut

Asked In :- t-systems, blackbaud, textron aviation,

Database Architect/ Designer Linux

Ques:- Which of the following items would not be important for you to record in your system documentation.Choose one:a. Any kernel patches you might apply.b. Applications that are installed.c. When did each user log on last.d. What problems with the system you h

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Linux Team Lead/ Tech Lead

Ques:- You have a large spreadsheet located in the /data directory that five different people need to be able to change. How can you enable each user to edit the spreadsheet from their individual home directories?Choose one:a. Create a symbolic link in the /data

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Linux Team Lead/ Tech Lead

Ques:- You want to configure your system so that when you create a new user a customized .bash_logout file will be created in the new user's home directory. How can you do this?Choose one:a. Copy the .bash_logout file to the new user's home directory.b.

Asked In :- Umbrella Infocare,

Linux Software Developer/ Programmer

Ques:- You issue the command mount without any options and the following output is displayed/dev/hda1 on / type ext2 (rw)none on /proc type proc (rw)/dev/hda9 on /home type ext2 (rw)/dev/hda7 on /tmp type ext2 (rw)/dev/hda5 on /usr type ext2 (rw)/dev/hda6 on /va

Asked In :- Reliance Jio, Slk Software Pvt Ltd,

Linux Software Developer/ Programmer

Ques:- You need to search the entire directory structure to locate a specific file. How could you do this and still be able to run other commands while the find command is still searching for your file?Choose onea. find / -name filename &b. find / -name filename

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Linux Team Lead/ Tech Lead

Ques:- Which one of the following factors does not play a role in choosing the type of backup media to use?Choose one:a. How frequently a file changesb. How long you need to retain the backupc. How much data needs to be backed upd. How frequently the backed up d

Asked In :-

Linux Web Designer

Ques:- A listing of the /data directory showsdrw-rw-r– 1 root accounting 17249 Sep 7 10:08 accountingdrw-rw-r– 1 root admin 7202 Sep 17 9:10 administrationdrw-rw-r– 1 root humres 13367 Sep 1 12:58 humresdrw-rw-r– 1 root sales 9449 Sep 22 7:34 salesGeorge, wh

Asked In :- Zentron Labs, Digite Infotech, V-Tech Solutions, bitgo, inc.,

Linux Team Lead/ Tech Lead

Ques:- What is the purpose of the command xargs?Choose one:a. xargs is used to pass arguments from one command to another.b. xargs is used to redirect standard output to a file.c. xargs is used to redirect standard error to a file.d. xargs is used to use the con

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Linux Team Lead/ Tech Lead

Ques:- You create a new user account by adding the following line to your /etc/passwd file.bobm:baddog:501:501:Bob Morris:/home/bobm:/bin/bashBob calls you and tells you that he cannot logon. You verify that he is using the correct username and password. What is

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Database Architect/ Designer Linux

Ques:- As the system administrator you have created a directory containing some scripts that you have written. You want to have all your users to be able to run this scripts. Which file should you edit to ensure that the scripts will run without your users havin

Asked In :- Network Labs, logic-fruit technologies, croma, inncrewin technologies,

Linux Software Developer/ Programmer

Ques:- As a system administrator, you are instructed to backup all the users' home directories. Which of the following commands would accomplish this?Choose onea. tar rf usersbkup home/*b. tar cf usersbkup home/*c. tar cbf usersbkup home/*d. tar rvf usersbku

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Linux Team Lead/ Tech Lead

Ques:- You telnet into several of your servers simultaneously. During the day, you sometimes get confused as to which telnet session is connected to which server. Which of the following commands in your .profile file would make it obvious to which server you are

Asked In :- applicate it solutions pvt. ltd.,

Database Architect/ Designer Linux

Ques:- You cannot mount /dev/hdb1 and suspect that the superblock is bad. How do you fix this?Choose one:a. Use the mkfs command.b. Use the fsck command with the -f option.c. Use the e2fsck to replace the superblock with a copy saved to another location on your

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The Linux category on takluu.com is designed for candidates preparing for technical interviews where a solid understanding of Linux is crucial. Whether you’re applying for roles in system administration, DevOps, cloud computing, cybersecurity, or backend development, proficiency in Linux is often a key requirement.

Linux is an open-source operating system based on the Unix architecture and is known for its performance, flexibility, and security. It powers most of the world’s servers, cloud platforms, mobile devices (Android), and embedded systems. This category focuses on helping you prepare for real-world Linux interview questions and hands-on scenarios.

Key topics you’ll find here include:

Linux file system hierarchy and navigation commands
File permissions, ownership, and chmod/chown usage
Process management using ps, top, kill, nice, etc.
User management and access control
Shell scripting and automation (Bash)
Package management (apt, yum, rpm, etc.)
Disk and memory usage analysis
System startup, services (systemd, init), and cron jobs
Network configuration and troubleshooting tools (ping, netstat, ifconfig, ssh)
Log analysis and system monitoring

The interview questions presented in this section are practical, scenario-based, and aligned with what companies expect in technical rounds. We cover both entry-level and advanced topics to ensure that you’re prepared whether you’re a fresher or an experienced professional.

Linux isn’t just a technical skill—it’s a foundational knowledge that unlocks a wide range of career opportunities. Let this category be your stepping stone to mastering Linux concepts and confidently answering interview questions with hands-on clarity and precision.

Questions in: Linux

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