We are all aware of the fact that there is one word to manage all the hardware resources of your laptop or desktop and to allow proper communication between the software and the computer hardware, without which the software would not function; Like Windows XP, Windows 7, Windows 8, MAC; LINUX is such an operating system.
LINUX is known as the most widely used operating system and is best known for its efficiency and fast performance. LINUX was first introduced by Linux Torvalds and is based on Linux Kernal.
It can run on various hardware platforms from HP, Intel, IBM, etc.
Did you know that over 90% of the world’s fastest computers use Linux? No doubt why! Linux is fast, powerful, and a technician’s favorite. If you want to become a Linux system administrator, this is the right place to prepare for your interview. In this article, I’ll go over some of the most common and important Linux interview questions and answers.
In this article, we will look at various Linux interview questions and answers that will not only help you prepare for the interviews, but also help you learn everything about Linux. Questions include Linux administrator questions, Linux command interview questions, etc.
What is Linux?
Linux is an Open Source operating system based on Unix. Linux was first introduced by Linus Torvalds. Linux’s main goal was to provide a free and low-cost operating system for users who could not afford operating systems such as Windows, iOS, and Unix.
What do you mean by Linux kernel? Is it legal to edit it?
Answer: "Kernal" basically refers to the core component of the computer’s operating system, which provides basic services for the other parts and interacts with user commands. When it comes to "Linux Kernal", it is known as low-level system software that provides an interface for user-level interactions.
Linux Kernal is considered free and open source software capable of managing hardware resources for users. Since it is released under the General Public License (GPL), it is legal for anyone to edit it.
What is the difference between LINUX and UNIX?
Answer: Although there are several differences between LINUX and UNIX, the items listed in the following table cover all the main differences.
|LINUX is an open source software development and free operating system used for computer hardware & software, game development, PCs, etc.||UNIX is an operating system which is basically used in Intel, HP, internet servers, etc.
|LINUX has priced as well as freely distributed and downloaded versions.||Different versions/flavours of UNIX have different price structures.
|Users of this operating system could be anyone including home users, developers, etc.||This operating system was basically developed for mainframes, servers and workstations except for OSX which is designed such that it can be used by anyone.
|File support system includes Ext2, Ext3, Ext4, Jfs, Xfs, Btrfs, FAT, etc. ||File support system includes jfs, gpfs, hfs, etc.
|BASH (Bourne Again Shell) is the Linux default shell i.e. text mode interface which supports multiple command interpreters.||Bourne shell serves as the text mode interface which is now compatible with many others including BASH.
|LINUX provides two GUIs, KDE and Gnome.||Common desktop environment was created which serves as a GUI for UNIX.
|Examples: Red Hat, Fedora, Ubuntu, Debian, etc.||Examples: Solaris, All Linux
|It provides higher security and has about 60-100 viruses listed till date.||It is also highly secured and has about 85-120 viruses listed till date.
Can you list the basic components of LINUX?
Answer: The Linux operating system essentially consists of 3 components. Are:
Kernel: It is considered to be the central part and is responsible for all the important activities of the Linux operating system. The Linux kernel is considered free and open source software capable of managing hardware resources for users. It consists of several modules and interacts directly with the underlying hardware.
System Library - Most of the operating system functions are implemented through system libraries. These act as a special function with which application programs access kernel functions.
System Utility: These programs are responsible for performing specific tasks on an individual level.
How to write the output of a command to a file?
You can use the redirection operator (>) to do this.
Syntax: $ (command) > (filename)
How to see the list of mounted devices on Linux?
By running the following command:
$ mount -l
How to find where a file is stored in Linux?
You can use the locate command to find the path to the file.
Suppose you want to find the locations of a file name sample.txt, then your command would be:
$ locate sample.txt
How to find the difference in two configuration files?
You can use the diff command for this:
$ diff abc.conf xyz.conf
Explain the virtual desktop
Answer: If multiple windows are available on the current desktop and the problem arises of minimizing and maximizing windows or restoring all current programs, ’Virtual Desktop’ serves as an alternative. It allows you to open one or more programs on a clean page.
Why do we use LINUX?
Answer: LINUX is often used because it is completely different from other operating systems, where each aspect has something extra, i. H. some additional functions.
Some of the main reasons to use LINUX are listed below:
It is an open source operating system that gives programmers the advantage of developing their own custom operating system.
The software and server license required to install Linux are completely free and can be installed on many computers if required.
You have small or minimal but manageable problems with viruses, malware, etc.
It is highly secure and supports multiple file systems.
What is LILO?
Answer: LILO (Linux Loader) is the boot loader for the Linux operating system to load into main memory so that it can start working. Bootloader is a small program that manages a dual boot. LILO is in the MBR (Master Boot Record).
Its great advantage is that it allows Linux to start quickly when installed in the MBR.
Its limitation lies in the fact that not all computers can tolerate modifying the MBR.
What is the exchange space?
Answer: Swap space is the amount of physical memory that Linux allocates to temporarily store some simultaneous programs. This condition usually occurs when there is not enough memory available to support all the programs running at the same time. This memory management involves paging memory to and from physical memory.
There are several commands and tools available to manage swap space usage.
Linux interview questions Summary
So concluding this article with the knowledge that Linux is a complete operating system having different versions which are suitable for any type of user (new / experienced). Linux is considered to be much more user-friendly, stable, secure and reliable, which can run continuously for years without a single restart.
This article has covered all the parts of Linux that may pose maintenance questions. Hope you have a clear idea of the topic. Keep learning and all the best.