Bash: how to enter password for sudo

[jackripper]

So I just got into Bash and I'm having some fun with it. So I'm making a script that just simply shutsdown the computer. The problem I'm having, with the code presented below, is when the script is ran it ask for a password. So what am I doing wrong here?

#!/bin/sh
echo "shutting down now!"
sudo PASSWORD
shutdown -h now

[reed9]

I know almost nothing about bash scripts, but I can say with fair confidence that sudo PASSWORD isn't going to work. Just like if you typed that into a terminal, the next command wouldn't run with elevated privileges.

It should be

sudo shutdown -h now

or just

sudo halt

If you want a user to be able to run a command with elevated privileges and without being asked for a password, you need to edit the /etc/sudoers file and specify it there.

Sudoers Manual

[jackripper]

how would I go about editing the /etc/sudoers file?

[reed9]

su
visudo

Usually this defaults to using vi as the editor. Some distros have changed this default behavior to an easier editor like nano.

If it uses vi, and you prefer nano, do

su
EDITOR=nano visudo

[jackripper]

I'm sorry I didn't ask that right. I know how to edit the file I'm just not quite sure what code to use to get this going.

[reed9]

Here is a pretty detailed example sudoers file to give you an idea of how to do things.
http://www.gratisoft.us/sudo/sample.sudoers

Basically, you'll need something like

username        ALL = NOPASSWD: /sbin/halt

username could also be a group the user belongs to.