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Old 09-25-2014, 03:23 PM   #1
Nbiser
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How to su root in a bash script:

Hi everyone!

I have been learning bash scripting and I am trying to write a simple script that will su root, with the password itself being in the bash script. I have been doing a lot of research online and reading in the man pages but haven't been able to figure out how to pull it off. Any ideas on how this can be done? Thanks in advance!

Nbiser
 
Old 09-25-2014, 03:27 PM   #2
suicidaleggroll
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You don't do that, because it would be an absolutely horrible security problem.
 
Old 09-25-2014, 03:31 PM   #3
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Agreed.

Look into 'sudo' and the 'sudoers' file. From there you can allow a certain user permissions to run a certain program, with or without a password.
 
Old 09-25-2014, 03:36 PM   #4
Nbiser
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Quote:
Originally Posted by suicidaleggroll View Post
You don't do that, because it would be an absolutely horrible security problem.
I just want to know if it can be done...I am planning on deleting it as soon as I see that it works.
 
Old 09-25-2014, 03:40 PM   #5
astrogeek
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No.
 
Old 09-25-2014, 10:59 PM   #6
psionl0
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I tried piping the password into su:
Code:
$ echo 123 | su  
su: must be run from a terminal
I guess that settles that question.

BTW "123" isn't really my su password.
 
Old 09-26-2014, 01:16 AM   #7
pan64
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actually it is a very bad idea, but theoretically you may try to make it in a test environment. I would suggest you to try the command expect, it is used to handle such kind of problems.
 
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Old 09-26-2014, 03:39 AM   #8
NevemTeve
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Mayhaps it is su -c 'somepath/somescript' you want to do.
 
Old 09-26-2014, 04:58 PM   #9
Nbiser
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Thanks for all of the posts guys! I will try some of the options that you gave me when I get a chance and let you know how it goes.

Nbiser
 
Old 09-29-2014, 03:53 PM   #10
Nbiser
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I tried all of the options that you gave me on my machine but they didn't work. Expect seems to be the best option and I still have to fool around with it some...but I don't think that it will work on su and sudo. It seems that su and sudo are quite secure when it comes to bash scripts! Thanks for all the tips guys!

Nbiser
 
Old 09-30-2014, 12:13 AM   #11
pan64
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http://www.linuxquestions.org/questi...h-sudo-638079/
http://www.datauniv.com/blogs/2013/0...expect-script/
http://www.linuxquestions.org/questi...or-4175459818/
 
  


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