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Old 08-03-2009, 10:25 AM   #1
Registered: Mar 2006
Location: Ireland
Distribution: Debian Etch
Posts: 72

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is there a /etc/group cache?


can anybody tell me if there is a group cache, I ask this because I have just updated my group membership using usermod, specifically, in a root shell, I have granted myself access to the "disk" group on my machine, like so: "usermod -G dialout,audio,video,games,wheel,disk gmurphy"

Still as root, I validate with the command: "groups gmurphy", producing this output: "gmurphy disk dialout audio video games wheel".

So far, so good, but when I revert back to a normal shell and use the command: "groups", the output indicates that I have not been placed in the "disk" group: "gmurphy dialout audio video games wheel"

In the same shell, when I explicitly specify my username with the groups command like so: "groups gmurphy", it gives the correct output: "gmurphy disk dialout audio video games wheel"

The program that requires access to the disk group is still not functioning so it must be using the faulty information as well.

I have run into this problem before but I was in a hurry and just rebooted the machine (i'll probably do the same thing now ;-) ) but there must be a solution for this, does anyone know?
Old 08-03-2009, 10:37 AM   #2
Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
Posts: 43,417

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Yes, there is a cache, if you're running the nscd server, BUT groups are assigned when an environment starts, and don't change outside of the environment that changes one until a new one is started. So you're seeing correct behaviour, just log out and in again.


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