Trevor logs into his account on ssh://foobar.university.edu as one of the developers on the box, and he gets the message:
id: cannot find name for group ID 131
Trevor then checks this out using
Trevor discovers that there is no 131 anywhere in the /etc/group file.
Trevor then runs id ...
> id trevor uid=4460(trevor) gid=131 groups=48(foobar),51(doobar),131
To discover his primary group apparently does not have a name attached to it.
- What likely happened to cause this circumstance on the foobar.university.edu box ?
- Suppose trevor wants to fix this (e.g., by just creating a "trevor" group that maps to GID 131) what is the best way to do this without potentially breaking anything else on the server ?