Top 25 Linux Interview Questions

Top 25 Linux Interview Questions and Answers

Q:1 What is Kdump and why it is required ?
Q:2 How to check when was the file system scan last time ?
Q:3. ...
Q:4 How to run fsck forcefully on a OS file system on next reboot ?
Q:5 Which tool is used to analyze crash dump or vmcore file on CentOS 7 & RHEL 7 ?

What are the questions asked in Linux interview?
What do I need to know about Linux interview?
How do I prepare for Linux admin interview?
What is your experience working with Linux?
Why is Linux better than Windows?
What are the basic elements of Linux?
Should I put Linux on my resume?
What is kernel in Linux interview questions?
What are daemons in Linux?
How do I see CPU usage on Linux?
How do I see CPU and memory usage on Linux?
What is Shell Linux?

What are the questions asked in Linux interview?

Linux Commands Interview Questions and Answers for Experienced

What is Linux? ...
What is the difference between UNIX and LINUX? ...
What is BASH? ...
What is Linux Kernel? ...
What is LILO? ...
What is a swap space? ...
What is the advantage of open source? ...
What are the basic components of Linux?

What do I need to know about Linux interview?

What is Linux Kernel? Is it legal to edit Linux Kernel? ...
What is LILO? LILO stands for LInux LOader. ...
What is Swap Space? ...
Which are the Linux Directory Commands? ...
What is Virtual Desktop? ...
Explain grep command. ...
Explain the redirection operator. ...
Why is the tar command used?

How do I prepare for Linux admin interview?

The following Linux admin interview questions and example answers can help you prepare for your interview:

Explain how you would assign the umask to a user permanently.
What would you do to change the default run level?
Describe your process for creating an ext4 file system.
How would you use NFS to share a directory?

What is your experience working with Linux?

Comfortable with command line You know how to move files, create "one-liners" for loops, etc. Also able to integrate your work to and from a remote host, not just run commands. ... Since Linux is command line based and does not (well not often) use a GUI, everything can be automated to a point.

Why is Linux better than Windows?

Linux is generally more secure than Windows. Even though attack vectors are still discovered in Linux, due to its open-source technology, anyone can review the vulnerabilities, which makes the identification and resolving process faster and easier.

What are the basic elements of Linux?

Every OS has component parts, and the Linux OS also has the following components parts:

Bootloader. Your computer needs to go through a startup sequence called booting. ...
OS Kernel. ...
Background services. ...
OS Shell. ...
Graphics server. ...
Desktop environment. ...
Applications.

Should I put Linux on my resume?

Most of the time too, you'll want your resume tailored to the job you're applying for, and so unless you're getting a position as a *nix admin, why put that on? Rule of thumb, unless you really know something, don't mention it. ... Don't lie, but some jobs (like in my company) use Linux for development.

What is kernel in Linux interview questions?

The Linux Kernel is a low-level systems software whose main role is to manage hardware resources for the user. It is also used to provide an interface for user-level interaction. There are so many Linux distributions but the one thing that they have in common is the Linux kernel. Each operating system uses a kernel.

What are daemons in Linux?

A daemon is a service process that runs in the background and supervises the system or provides functionality to other processes. Traditionally, daemons are implemented following a scheme originating in SysV Unix.

How do I see CPU usage on Linux?

14 Command Line Tools to Check CPU Usage in Linux

1) Top. The top command displays real-time view of performance-related data of all running processes in a system. ...
2) Iostat. ...
3) Vmstat. ...
4) Mpstat. ...
5) Sar. ...
6) CoreFreq. ...
7) Htop. ...
8) Nmon.

How do I see CPU and memory usage on Linux?

5 commands to check memory usage on Linux

free command. The free command is the most simple and easy to use command to check memory usage on linux. ...
2. /proc/meminfo. The next way to check memory usage is to read the /proc/meminfo file. ...
vmstat. The vmstat command with the s option, lays out the memory usage statistics much like the proc command. ...
top command. ...
htop.

What is Shell Linux?

The shell is an interactive interface that allows users to execute other commands and utilities in Linux and other UNIX-based operating systems. When you login to the operating system, the standard shell is displayed and allows you to perform common operations such as copy files or restart the system.