How to use PuTTY
PuTTY is a free and open source program that emulates a terminal as a client for SSH, Telnet, rlogin, and...
What is Regex
A regular expression, also called regex, is a way or a method of identifying a string from a given text...
Fuser
The fuser utility that comes preinstalled with Linux is a very powerful tool. As the name suggests, it provides information about...
Pascal programming language
Pascal is one of the reference programming languages in computer science. Pascal was developed by Swiss Niklaus Wirth in 1970 to implement structured programming,...
Initial settings of a CentOS 7 VPS server
The basic settings of a VPS server with CentOS 7 are similar to those in Ubuntu. The steps below will...
How to check and monitor a hard drive in Linux
Smartmontools allows Linux administrators to monitor hard drive health using SMART technology. With smartctl and smartd, you can detect disk...
What is MTR
MTR is a simple network diagnostics tool that combines the functionality of traceroute and ping programs commonly used as a...
What is Address Resolution Protocol (ARP)
When a machine wants to send a packet on an Ethernet network, it has the IP address but not the...
What is Perl
Perl is an acronym for Practical Extraction and Report Language. It was designed by Larry Wall to be a tool...
Array data structure
A string of data or an array is a structure that contains multiple values of the same type of data....
Linux from Scratch
Unlike classic distributions, it does not come with a CD and does not install with a few clicks but is...
What is BASH
Bash is a scripting language compatible with shell commands. It can be executed either from the standard input or from...
