shift
Move position parameters.
Summary
shift[n]The main purpose
Parameters
n (optional): an integer greater than or equal to 1 and less than or equal to the number of parameters. The default is 1.
return value
Returns successful unless n is greater than the number of parameters or n is less than 1 or other illegal values.
example
Assume our script file (test.sh) is as follows:
#!/usr/bin/env bash
# Display the first three positional parameters.
echo "$1 $2 $3"
# Remove the first two positional parameters and rename $3 to $1, and so on.
shift 2
echo "$1 $2 $3"Execute this script in the terminal:
sh test.sh q w e r tThe return information is as follows:
q w e
e r t
