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System Library: These are special functions or programs with the help of which application programs or system utilities can access features of the kernel without any requirement of code.

Kernel: It is considered a core or main part of Linux and is generally responsible for all major activities of OS such as process management, device management, etc.

Linux generally consists of five basic elements or components as given below: What are basic elements or components of Linux?

GUI (Graphical User Interface): It provides an interface for users to interact with the system and allows to use of GUI applications such as VLC, Firefox, etc.Įnhance your chances of performing well in the interviews with our comprehensive guide, which covers important topics on Linux to help freshers, as well as experienced candidates, ace their interviews.

Supports customized keywords: There are many different languages used throughout the world, therefore Linux supports the installation of multiple languages keyboards.

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Application Support: It has its own software repository i.e., place or storage location from where software can be retrieved so that users can download and install applications.

Multiprogramming System: More than one can function or an application can run simultaneously.

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More secure: It is more secure as it provides security using authentication features like password authentication, security auditing, and file system access control.Robust and Adaptable: Linux can operate for prolonged periods without crashing and considered to have very much immune to security threats.

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Free and Open Source: It is freely and easily available to anyone.Some important features of Linux OS include: Flavors of Linux OS include Ubuntu, Debian, SUSE Linux, Gentoo, etc. Furthermore, it can be installed in mobiles, laptops, computers, notebooks, etc. It is freely distributable and is generally built around Linux Kernel (low-level system software that is used to manage hardware resources for users). It was first released on 5 October 1991 by Linus Torvalds for computers and is considered more secure and faster than Windows. Linux is a Unix-like open-source computer operating system (OS) that directly manages hardware and resources of a system such as CPU, memory, and storage, and manages the communication between software and hardware. What do you mean by Linux? Explain its features. What is the difference between BASH and DOS? Name the command used to review boot messages. Which command is used to check the memory status? Name the command that is used to check all the listening ports and services of your machine. Which command is used to count the number of characters in a file? Which command is used to check the size of file or directory? Which command is used to check the default run level? Write the difference between Soft and Hard links? What is SSH? How we can connect to a remote server via SSH. Name default ports used for DNS, SMTP, FTP, SSH, DHCP and squid. What are different network bonding modes used in Linux? What are the advantages of using NIC teaming? Why /etc/nf and /etc/hosts files are used? Name the first process that is started by the kernel in Linux and what is its process id? What is the difference between cron and anacron? Name daemon that controls the print spooling process. Name the file that is used to automatically mount file systems. What are file permissions in Linux? Name different types of file systems in Linux. Under the Linux system, what is the typical size for swap partitions?

Name the Linux that is specially designed by Sun micro system. What is a maximum length for a filename under Linux? Name different types of modes used in VI editor. What is Linux Shell? What types of Shells are there in Linux?

What do you mean by a Process States in Linux?