I got a problem that: I have a file .sh #!/bin/bash var=$(zenity --forms --title="T?t gi? v? yêu nhé" \ --text="V? mu?n t?t máy sau bao nhiêu phút n?a" \ --separator="," \ --add-entry="V? di?n s? vào dây") case $? in 0) sudo shutdown -h $var ;; 1) exit 0;; -1) echo "An unexpected error has occurred." ;; esac How can sudo command autofill the password from echo command or a file. I read about sudo -S options, but i dont know how it works. Anyone can give an example about it! Thanks guys