I have faced interview many time. Most of time I get myself nervous. I always discussed the questions faced by friends during there interview. That is I’m writing to my blog.

Q. What is Linux ?

Linux is an open-source version of the UNIX operating system . It is based on the Linux Kernel, and can run on different hardware platforms .

Q. What do you understand by opensource ?

All the programs which source code is freely available to all users are called opensource.To which users can there own changes. Open source codes are typically created as a team effort in which programmers improve upon the code and share the changes within there community.

Q. What is kernel ?

A kernel is the part of the operating system that manages system resources. Kernel is responsible for controlling access to CPU, memory, disk I/O, and networking.

Q. What is Shell ?

Shell provides user interface to the Unix system. It take input from user and process it and send show result to user.

Q. What is Login Shell and Non Login Shell ?

Login Shell: A login shell is first process that executes under your user ID when you log in for an interactive session.
Non Login Shell: A non login shell is which invoked from a login shell, Also called sub shell of login shell.

Q. Minimum disk partition required for Linux installation?

Minimum partition: 2 ( root and swap)

Q. Command to show all running processes in Linux system ?

# ps auxt

Q. Command to display all running processes owned by current user ?

# ps ux

Q. What command is used to change user’s password expiration time ?

# chage

To be continue with new updates…..


  1. The partition one is wrong – the minimum partitions are /boot and / (root) – a machine can work without swap partitions, but cannot load the bootloader without a boot partition.

  2. thanks the question were usefull please can you update me once anything comes up thanks very much

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