Linux su password

Question

I want to change the user in one command line with su

echo password | su user

But this is not working. Is there a other possibility? best wishes

Answer 1

First of all: Ask yourself whether it is really necessary for a script to know the password. sudo and SE-Linux usually give you plenty of options to avoid entering passwords.

This being said, su opens its controlling terminal to read the password, not stdin. You can use sudo with the -S option to read the password from stdin.

Answer 2

From sudo's manual:

-S

The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device. The password must be followed by a newline character. 

Answer 3

Do the folowing ..

passwd root it will ask you for a new password put it and then you log as administrator and do what you want