BashCheetSheet.md

Syntax Explanation #!/bin/bash Used to tell the operating system the path it should use to interpret the file. bash file.sh Used to execute the script in the terminal. ./file.sh Used to execute the script if it is executable.

Used to make comments in the script.

&& logical AND operator. | | logical OR operator. $# Used to expands the number of arguments passed to the script. $0 Used to expands to the name of the shell. $1, $2 Used as an input parameter that you can add when running script. exit [0-255] Used to exit the script and return the number from 0 to 255. $ Used for parameters and variables. () Used for running commands in a subshell. $() Used to save the output of commands. (()) Used for arithmetic. $(()) Used to retrieve the output of arithmetic expressions. [] Used in filename expansion and string manipulation. <( ) It is very similar to a pipe and used for process substitution. { } Used to expand sequences. ${ } Used for string manipulation and variable interpolation. | Used to run multiple commands together.|

            Used to send output to a file.

         Used to append output to a file.

; Used to separate multiple commands. < Used to get input from a file. ~ Expands to the home directory. ~/.bashrc Read by every non-login shell. /etc/profile Executed automatically at login.