sudo & root pass in one line!?

**shirani** · June 18th, 2013

Hi;
I need a command in terminal to use sudo and the root password in a single line!
In general we enter sudo and then terminal prompt us to insert pass but i wanna to insert sudo and pass in one step!
Is it possible?

J.S
Be free...

**Lars Noodén** · June 18th, 2013

You can set specific programs to not need passwords in sudo, but you have to be careful in setting it up.

Here is one example:

Code:

%adm ALL=(ALL) NOPASSWD: /sbin/ifconfig eth0 *

It allows anyone in the group adm to adjust the interface eth0.

**NikTh** · June 18th, 2013

For one time you can do

Code:

echo "password here" | sudo -S apt-get update && history -c

The apt-get update command is an example here, you can replace it with yours.

~~The passwd file contains your password and because of it is dangerous to have your password in a text file, the last command rm passwd will remove this text file at the end.~~

The history -c will remove all the bash shell's history , where your password is exposed.

Regards
NikTh

**shirani** · June 18th, 2013

thx NikTh for your help...

have good times

**Lars Noodén** · June 18th, 2013

That could be boiled down even shorter, skipping the redirect to a file and just piping the echo into sudo. However, either way you end up with the password unencryped in the shell's history which is a very big risk. If you do either way, the history should be cleared immediately, history -c but if you are using another shell than bash, the method might be different. I'd advise against anything that puts the password in cleartext.