Bash, the Bourne Again Shell, is the default command-line interpreter in most Linux distros.

Adding values

Aliases

Append a string after each line

Arithmetic evaluation and errexit trap

Assign Output of Shell Command To Variable

Brackets

Built-in variables

cat

Cheat Sheet

Check Whether You’re Root

Cleaning Log Files

Commands

Command Exit Status

Command Line Arguments

Command Substitution

Comments

Concatenating Strings

cut

Dangerous Commands

Display output

Find largest files

Find new files

For loop

Functions

Get Number of Files or Directories

Globs

IFS (internal field separator)

if...then...else

Helicopter Animation

Hello World

List files by size

List files excluding some files

Parse a line from a file

Parsing Date and Time

Quotes

Read a file (data stream, variable) line-by-line (and/or field-by-field)

Receive Input from User

Redirect Output To File, And Still Have It On Screen

Redirection

Rename multiple files

rev

Run a program in the background

Run graphical Linux applications

Scripts

Send email

ShellCheck

Shellshock

Slicing Strings

Store the return value and/or output of a command in a variable

Switch

tac

Test File Existence

While loop

WordSplitting