replace a string from name off all files in a directory.

To replace a particular string from the name of all files in a
directory follow the below steps

• create a file script.sh and change its permission to 644
• write the below thing in the script

here in the below example we are replacing the string in with all from
all files in the directory.

for f in *-in.wav; do mv "$f" "${f%-in.wav}-all.wav"; done

Searching a particular string from unknown file or to search a file from the known string of that file

grep string_to_Search * -Rn

note:- the string here (a sentence or word) is the one which is there in some unknown file and you want to know the name of that file.

HIDING SSH CONNECTION

use the below command to hide your ssh connection

ssh -T user@host /bin/bash/ -i