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  • and which script does this verification? The name of the script I mean :) Commented Aug 5, 2014 at 15:40
  • @LittleChild I doubt it's a script. It's an application which provides login prompt /sbin/mingetty or /sbin/agetty mostly. Commented Aug 5, 2014 at 15:51
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    @UVV No, not getty. Getty is basically a loop running forever on a terminal. For each login prompt, getty runs login, and that's the program that performs the authentication (for a text mode console login). Commented Aug 5, 2014 at 22:35
  • @Gilles Thanks for the correction. It's not a script anyway ;) Commented Aug 6, 2014 at 6:27