UID problem Post: 8343

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Top Forums UNIX for Dummies Questions & Answers UID problem Post 8343 by Perderabo on Wednesday 10th of October 2001 10:12:09 AM

10-10-2001

Administrator Emeritus

Quote:

Originally posted by ChrisFoxx

Flavor = TurboLinux 6.0 Server Lite (comes up in env as "Linux-Gnu")

Created the accounts by "useradd", then passwd <uid>.

They used to work!

Oh, and I forgot: When I try to log those accounts in, it gets a message that says the system is going down last September 30th.

>>>>>>>>>>Chris

I don't have access to a Linux system so I can't check anything. But that last paragraph gives me an idea.

On some systems (but not all), the shutdown command creates a file, often called /etc/nologin. The login program checks for the existence of this file and refuses no-root logins if it exists. This is so users cannot login just as the system is going down. If the file exists, it is displayed as the error message. Even if the login program itself doesn't do this, it can also be implemened in global shell scripts like /etc/profile.

I'll bet that /etc/nologin (or its linux equivalent) exists. If so, remove the file. But that file should have been removed somewhere in the start-up script at reboot time. So there is probably a problem there which will need to be investigated. Can anyone see if linux uses /etc/nologin?

Perderabo

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LEARN ABOUT OSX

nologin

NOLOGIN(5)						      BSD File Formats Manual							NOLOGIN(5)

NAME

     nologin -- disallow logins

DESCRIPTION

     Programs such as login(1) disallow logins if the nologin file exists.  The programs display the contents of nologin to the user if possible
     and interrupt the login sequence.	This makes it simple to temporarily prevent incoming logins systemwide.

     To disable logins on a per-account basis, investigate nologin(8).

SECURITY

     The nologin file is ignored for user root by default.

IMPLEMENTATION NOTES

     The nologin feature is implemented through login.conf(5), which allows to change the pathname of the file and to extend the list of users
     exempt from temporary login restriction.

     PAM-aware programs can be selectively configured to respect nologin using the pam_nologin(8) module via pam.conf(5).

     The nologin file will be removed at system boot if it resides in /var/run and cleanvar_enable is set to ``YES'' in rc.conf(5), which is
     default.  Therefore system reboot can effectively re-enable logins.

FILES

     /var/run/nologin  default location of nologin

SEE ALSO

     login(1), login.conf(5), pam.conf(5), rc.conf(5), nologin(8), pam_nologin(8), shutdown(8)

BSD
								   May 10, 2007 							       BSD

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