Bash shift

External

• http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_09_07.html

Internal

• bash

Overview

This command one number as argument and shifts the positional parameters to the left by that number. The positional parameters from n + 1 to $# are renamed to variable names from $1 to $# - N+1.

Say you have a command that takes 10 arguments, and N is 4, then $4 becomes $1, $5 becomes $2 and so on. $10 becomes $7 and the original $1, $2 and $3 are thrown away.

If N is zero or greater than $#, the positional parameters are not changed (the total number of arguments, see Section 7.2.1.2) and the command has no effect. If N is not present, it is assumed to be

Also see