12-28-2011 02:35 AM
It happened to me that some files in the system had owner and group numerical. Althought I read about it some time ago I can't find explanation anymore. Could you explain me what is it?
12-28-2011 03:05 AM - edited 12-28-2011 03:07 AM
If there are no entries in /etc/passwd or /etc/group for the UID/GID, then numbers are displayed.
It can also show up if you are using NIS and the demon needs restarting:
01-02-2012 04:16 AM
This is something I learned from my guru. Well, if you see numerical values for owners in the ll output it corresponds to those users who are no longer defined on the system. A specific user could create a directory or a file somewhere in the file system tree space ... Lets say /tmp and for some reason or the other the system administrator removes the account with userdel.
Now, what happens to the files created by that user in /tmp. This will be in the form of a numerical value as the system no longer has a record of the user but the user wandered out into the filesystem space when he/she existed as a defined account. Sometimes it is good to use the /- nousers option with find, to find such users and possibly list or delete them depending on what is required.