uid and gid of wwwrun

English Network/Internet
#1

I’m having some issues with mailman + postfix ( the error is “/usr/lib/mailman/mail/mailman post micros”. Command output: Failure to exec script. WANTED gid 67, GOT gid 65533 )

and reading this I think I could be a error of the gid of wwwrun, so I check it


# cat /etc/passwd |grep wwwrun
wwwrun:x:30:8:WWW daemon apache:/var/lib/wwwrun:/bin/false

# cat /etc/group |grep wwwrun
nagcmd:!:107:nagios,wwwrun
www:x:8:wwwrun
wwwrun:x:464:

To check if something may be wrong I look at another computer


# cat /etc/passwd |grep wwwrun
wwwrun:x:30:8:WWW daemon apache:/var/lib/wwwrun:/bin/false
# cat /etc/group |grep wwwrun
www:x:8:wwwrun
wwwrun:x:471:
aldebaran:~ # cat /etc/passwd |grep wwwrun
wwwrun:x:30:8:WWW daemon apache:/var/lib/wwwrun:/bin/false

and then on a third computer


# cat /etc/group |grep wwwrun
www:x:476:wwwrun
wwwrun:!:474:

# cat /etc/passwd |grep wwwrun
wwwrun:x:474:474:WWW daemon apache:/var/lib/wwwrun:/sbin/nologin

I thought that uid and gids of system services must be the same … for instance postfix has uid 51 in the three systems.

Is something wrong or it is OK?

Why two groups www and wwwrun ?

best regards

#2

There’s no particular reason for UID and GID to be the same. I’m not seeing this as an obvious problem.

#3

It is not as problem as long as you do not use e.g. NFS to mount a file owned by UID u and GID g on a system a system where, what you think is the same user, has a different UID v and/or GID h. Because ownership and thus permissions is bij UID and GID and not by username and groupname.