Using expr command-line utility in Bash Scripting Language to Calculate Mathematical expressions

In our last post "NUMBERS AND MATHS IN BASH SHELL SCRIPTING LANGUAGE", we saw the use of 'let' utility to perform mathematical calculations. Here in this tutorial...

3 Ways to create Swap in Linux

If you have a low RAM memory the swap partitions are the best solutions for you. swap is like  virtual memory  used when RAM is above 100%...

Server Monitoring with Elasticsearch

This article will go through the steps of monitoring a Linux server with Elasticsearch, Beats and Kibana. this  article  should  work in all Linux Systems.  its  quit...

RHCSA Understand and use essential tools PART 1

One of the most famous certificate in world of Linux is RHCSA  Redhat Certified  System Administrator  . There is many tutorials and books online to use  them....

Lsof 9 practical examples in Linux

As we all know that everything in Linux OS  is consist of file( library files, pipes, socket, device and .etc). Lsof meaning that is knowing  as “list...

How to Manage Kernel Modules in Linux

When we install Linux Like operating system at that time Linux kernel install most of device driver’s modules and after the installation it also allows us to...

Top 10 things to do after installing Ubuntu 16.10

To get maximum out of Ubuntu 16.10 users needs to get some tweaks. In this article we list the minimal things which a user should consider to...

netstat top 10 commands

Netstat is one of the most used commands by   system admins to checks the network and protocols  related to his machine. you can also list out...

Install DNS server Master and Slave on Centos 7

DNS server or The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private...

Reset root password RHEL7 Redhat official way

Reset root password is one of the daily tasks of an system administrator its  also the key to questions of  RHCSA exam and RHCE, because  you are ...