Question

Including Password in bash script

Asked by: americaster

Hi, I am wondering if anybody knows how to include a password in a script. I want to run a backup script as sudo and I need to include the password.
Many thanks.

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Asked On
2005-06-24 at 14:03:34ID21470223
Tags

bash

,

password

,

script

,

sudo

Topics

FreeBSD

,

Server Side Includes (SSI)

Participating Experts
2
Points
125
Comments
12

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Answers

 

by: gheistPosted on 2005-06-26 at 01:13:19ID: 14302999

For what purpose???
read command can read password:

unset IFS REPLY
REPLY=default
echo -n 'Password: '
read PASSWORD >/dev/null
echo $? $PASSWORD

 

by: americasterPosted on 2005-06-27 at 10:41:37ID: 14311104

Hi thanks for the reply. The reason for including the password is that I need to set a script that will run a command as SUDO. I know this is not secure but I am okay with that for now. Also I should have mentioned that this is a Darwin box (OS X).

 

by: gheistPosted on 2005-06-27 at 10:43:33ID: 14311122

Darwin leads you to macintosh area next time...

run visudo and add the line

%wheel  ALL=(ALL)       NOPASSWD: ALL

 

by: americasterPosted on 2005-06-30 at 16:35:51ID: 14343604

I was hoping to not remove the password prompts for sudo. Instead just include a password in the script. Maybe this isn't possible?

 

by: gheistPosted on 2005-07-02 at 11:13:23ID: 14354995

What command needs that password, on what system, sorry fo telling how to ask for password in script

Easiest way to include password is include it in comment
# top-secret-password

 

by: americasterPosted on 2005-07-06 at 06:02:06ID: 14377294

I have to cp -R a directory that is not owned by the logged in user. So in order to copy the directory I must run the cp as sudo.
The command is "sudo cp -R " but it will prompt me for a password. I was hoping to build this into the script so it could just read the password and move on to the next line.

 

by: gheistPosted on 2005-07-06 at 06:50:26ID: 14377789

what makes you think reenterin password twice makes sytem any safer ???

 

by: SubhumanPosted on 2005-09-02 at 09:53:47ID: 14811773

If I understand what you're trying to do, you may be able to do it if you echo the password on a pipe into the sudo command.  Note that some commands (passwd for example) on some systems seem to be smart enough to *not* accept a password unless it has been entered by the keyboard (eg, echo + pipe won't work here).  YMMV.

If this works, I also do not recommend that you do it; in fact, I heartily recommend that you do not do this.

But it's your system, and at the end of the day, your decision to make.  Giving you enough rope to hang yourself with is the Unix way. ;)

(Don't!) try something like this:

#!/bin/sh
/bin/echo 'yourpassword' | sudo /path/to/yourcommand ...

You probably want to chmod this file go-rwx...


A more secure solution would be to create a user account that has passwordless sudo access, and then just run the sudo command normally as this user.  This user should also not have ssh/etc login priveledges; ie the only way to run a command as this user is by either logging in at the physical machine, or by sshing in on an account that itself has normal password sudo access and using that to become the user.

 

by: gheistPosted on 2005-09-02 at 12:50:18ID: 14813083

WRONG!!!

 

by: SubhumanPosted on 2005-09-02 at 17:54:27ID: 14814444

OH NO!!!

 

by: gheistPosted on 2005-09-02 at 22:19:10ID: 14815017

sudo reopens stdin just like any application which handles passwords.

 

by: SubhumanPosted on 2005-09-02 at 22:37:06ID: 14815043

I'd hoped so, but hadn't bothered to test.

20120131-EE-VQP-002

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