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ECHO Command

The built-in echo command is an older form of printf command. Bash provides it for compatibility with almost all the shells. echo does not use a format string format like printf command It [ … ]

Shell Script Comments

We should be aware of the fact that we might not be the only person reading our code. A lot  of users and system administrators run script that were written [ … ]

Shebang

The #! Syntax used in scripts to indicate an interpreter for execution under UNIX/Linux operating systems. Most Linux shell and Perl/Python script starts with the following line. #!/bin/bashOR#!/usr/bin/perlOR#!/usr/bin/python It is [ … ]