What is the meaning of $_

Shell Programming and Scripting
1

Hi,

Can somebody tell the usage of "$_"

cd $_ ?

and ls $_ ?

2

my bash tell me $_=clear

you can use to clear screen

3

use ksh...

imp catch...

cd /tmp
cd /etc
ls <dir> ---> some directory
cd $_ -- ?

what will be "pwd" and how ?

4

does this help you

5

$_ :- Is a Special variable set to last argument of previous command executed.

Examples:-

#!/bin/bash
echo $_              # /bin/bash
                         # Just called /bin/bash to run the script.
du >/dev/null        # So no output from command.
echo $_              # du
ls -al >/dev/null    # So no output from command.
echo $_              # -al  (last argument)
:
echo $_              # :