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Old 06-05-2008, 12:53 AM   #1
packets
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how to put * in passwd with thousand of character


I have to disable thousand of user and the easiest way to do this is putting (*) in the passwd file.

However, I don't want to do this manually and looking for a bash commands that can out (*) in every user. I'm thinking of "echo" but does it can put (*) in the first character of the users in the passwd file?

Or do you have other suggestions?
 
Old 06-05-2008, 06:29 AM   #2
pixellany
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In the first place, you don't want "*" as the first character. Here is an excerpt from the passwd file:
Quote:
fred:x:509:509::/home/fred:/bin/bash
sam:x:510:510::/home/sam:/bin/bash
joe:x:511:511::/home/joe:/bin/bash
To disable an account, you would put "*" in place of the "x".

Try SED, e.g.
sed -i 's/:x:/:\*:/' /etc/passwd
This disables ALL users, so use it only as a starting point.
 
Old 06-05-2008, 06:30 AM   #3
indeliblestamp
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I think you're supposed to put a * in the beginning of the password field, not in the beginning of the line itself. i.e
Code:
games:*x:12:100:games:/usr/games:/sbin/nologin
instead of
Code:
*games:x:12:100:games:/usr/games:/sbin/nologin
Assuming you want it in the password field, the following sed line will replace a * for all lines between 50-100:
Code:
sed -ie '50,100s/^\(.*\)\:x/\1:*x/' passwd.test
NOTE: Your file will be overwritten with the changes, so make sure you test it on a backup file first. Change 50,100 to whichever start and end line numbers your range of blocked users lie in.
 
  


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