UNIX/Linux

UNIX and Linux Commands Tutorials

Ubuntu Server Setup – Security Best Practices

Upon successful installation of your Debian / Ubuntu server, a few configuration steps are essential in enhancing the security and functionality of the server. In this guide, we will take you through the basic steps….

Linux ps command – 20 Real Life Examples

The ps command, short for Process Status, is a command line utility that is used to display or view information related to the processes running in a Linux system. As we all know, Linux is….

mkdir command in Linux/Unix

The Linux directory structure is such that at any given point in the terminal, you are working inside a particular directory. The Linux directory hierarchy starts at the top with the root (/) directory and….

Linux vs Unix

Linux vs Unix. What are the differences between the two? If you began your IT career about a decade ago, chances are high that you did so at a time when Linux had already carved….

Grep Command in Linux/UNIX

In Linux and Unix Systems Grep, short for “global regular expression print”, is a command used in searching and matching text files contained in the regular expressions. Furthermore, the command comes pre-installed in every Linux….

ls command in Linux/UNIX

The ls command is one of the most commonly used commands in daily Linux/UNIX operations. The command is used in listing contents inside a directory and is one of the few commands beginners learn from….

Crontab example – every 5 minutes

Today we will look into crontab example to execute a script every 5 minutes. Crontab example Recently I installed memcached server on CentOS operating system to use as a caching mechanism for my VBulletin forum…..

Shell Script to Change Extension of Multiple Files in Unix

In unix environment, mv is the command to move files and we can use it to change file extension also. But it works with a single file only and it doesn’t take wild characters also.

Here I am providing a simple script that you can use to change extension of multiple files in a directory.

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