ps command's man page, what are these four "filesystem access" output-fields, specified using an
-o option, used for, i.e. what does a process use them for?
fuid / fuser fgid / fgroup
$ ps -o fuid,fuser,fgid,fgroup.
I get that the fuid/fgid returns an ID number, and that fuser/fgroup returns a name or ID number; also that fuid/fuser have to do with a user value, and fgid/fgroup a group value.
But how do these process values relate to a 'filesystem', or what does that mean?
I'm running Debian, Buster. Thanks.
fuser field selector is not to be confused with the
fuser command, which shows which processes are using a file.