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Can I edit login script? For I want to restrict the user to only have 3 login attempts. If the user fails to login in after 3 attempts, the system must shutdown.

Is this possible?

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See file

/etc/pam.d/common-auth 

This line should let someone have 3 attempts. It also unlocks after 21600 seconds (=6 hours).

auth required pam_tally.so onerr=fail deny=3 unlock_time=21600 

This will not shut down your system but have the user stay at the login screen with a notice (s)he can not login. I have not yet see a method where you can shut the system down after 3 failed loging attempts.

  • sir (Rinzwind)After doing modification to the common-auth. My system goes into low graphics mode.then there is no choice rather than reinstall the system .Is there any valid tested method or script, that help me out. – SachiN Feb 17 '13 at 19:02
  • where i can get the login script ?? – SachiN Feb 17 '13 at 19:45
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I'm not sure if you can shutdown the system from PAM. You need something where you can call your own custom script when the user fails to log in.

Take a look at fail2ban, that looks like you can set up a custom action.

  • Sir actually i want it on single system. – SachiN Feb 17 '13 at 19:35

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