Linux Control Operators

With the help of control operators you can put more than one command in the command line. It helps in performing a control function.

Use of control operators

Backslash enables control character but without shell interpretation.

Control Operator	Usage
;semicolon	More than one command can be used in a singleline.
& ampersand	Command ends with & and doesn’t wait for command to finish.
$?dollar question mark	Used to store exit code of the previous command.
&& double ampersand	Used as logical AND.
\|\| double vertical bar	Used as logical OR.
Combining && and \|\|	Used to write if then else structure in command line.
# pound sign	Anything written after # will be ignored.
escaping special characters