Bash is the command-line interface for Linux distributions like Ubuntu, CentOS, Debian, Mint, Kali, RedHat, Fedora, etc. Bash provides a lot of different type of commands and tools to manage a Linux system. In this tutorial, we will learn how to install Bash on a Windows operating system like Windows 10. What Is Bash? Bash is the most popular shell or command line used in Linux distributions. Bash alternatives are...
Linux Bash shell is the most popular shell. /bin/bash is the path and executable of the Bash shell. /bin/bash is a binary which is used in different ways to run and execute commands and scripts. Script File Interpreter #!/bin/bash In Linux and opensource world script files are very important. There are different type of scripting language used to write script files. As file extension is just a label for a script...
What is POSIX? We hear this term in Linux and Unix world but do not understand the meaning of POSIX. POSIX is the short form of Portable Operating System Interface . Lets start explaining everything about the POSIX. IEEE POSIX Standard POSIX is a standard developed for Unix operating systems. At the old times Unix has a lot od different implementations. This was creating problems about portability. One application developed for...
Linux and Unix ecosystem mainly used command line based. While working with command line and C Shell we generally need some values to use with commands. Shells provide environment variables for this. This environment variables can be managed with setenv command like add, change and remove. Syntax Syntax of setenv command is very simple we just need to provide the variable name and data
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setenv VARIABLENAME DATA |
List All Environment Variables We can use...
A scripting language is a programming language supports writing simply to medium level applications in operating systems like Linux, Ubuntu, Debian, CentOS, Windows, MacOS, BSD, Unix. Scripting languages can be used to run complex tasks automatically or manually with very little effort. We can describe actions in a scripting language and run them easily. In this tutorial, we will look at popular scripting languages used by different operating systems and...
Linux Bash provides a lot of useful features and commands. Pipe or | is one of them. Bash provides command line interface facility which mainly used to concatenate command output to another command. Concept In Linux everything is file. This may seem odd but it is. Every command executed will have three type of streams which can be used to provide or output data into and from a command. STDIN (0)...
Linux bash provides a lot of commands and features for Regular Expressions or regex. grep , expr , sed and awk are some of them. Bash also have =~ operator which is named as RE-match operator. In this tutorial we will look =~ operator and use cases. More information about regex command cna be found in the following tutorials. Introduction to Linux Grep Command With Examples Awk Regular Expression Commands and Examples Ultimate Sed...
Bash provides string operations. We can use different operations like remove, find or concatenate strings in bash. In this tutorial we will look how to add or concatenate strings in Linux bash. Put Variables Side By Side The simplest and easy to understand way to concatenate string is writing the variables side by side. We will write the variables like $a$b . We do not need extra operater or function...
as We generally use bash in order to execute commands. But as bash is a programming environment we have other programming related features. We can compare strings where these strings are output or error of some commands. In this tutorial we will look different use cases for string comparison in Bash Linux. Compare with Equality The most used examples for string comparison is comparing equality. We can compare two strings...
Linux bash have a lot of different type of programming features. While using these features we can create very complex scripts or applications in bash. In order to take notes in a script we should use comments. Comments provides useful information for system administrators. Comment Bash In bash comments starts with # . In the following example comments can be easily seen that those comments start from beginning of the...
