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I' having a little 'technical' #problem while #adding #users to a @group on a #Lubuntu #server.
Here's the puzzling thing (to me):
mc@Lubuntu1:~$ groups 
mc adm cdrom sudo dip plugdev lpadmin sambashare shared 
mc@Lubuntu1:~$ groups mc 
mc :  mc adm cdrom sudo dip plugdev lpadmin sambashare shared common

See the difference?
I cannot understand why the group "common" does not appear with the first command.
Perhaps someone more experienced than me with linux/ubuntu knows why this is happening?
Thanks in advance for any help.
@Christoph S , please give us the output of: "cat /etc/group"
Hans W hubzilla (AP)
I do not think @Christoph S has that problem :-)
I seem to recall there is an upper limit on active groups, not sure it is relevant here.
Please comment on the original post
@Christoph S , i can't. 😀
@manuelcaeiro , first lists all groups, second lists the members of the group mc.
@diritschka
mc@Lubuntu1:~$ cat /etc/group 
root:x:0: 
daemon:x:1: 
... 
shared:x:1002:ruth,mark,mc 
common:x:1003:ruth,mary,mc
@manuelcaeiro , ok, second lists the groups where mc is in. man groups: Print group memberships for each USERNAME or, if no USERNAME is specified, for the current process (which may differ if the groups database has
changed).
Permissions of the shared directory:
mc@Lubuntu1:~$ ls -ld /usr/local/share/COMMON 
drwxrwsr-x 2 root common 4096 Jul  3 16:23 /usr/local/share/COMMON
Hans W hubzilla (AP)
Why is it that users always have simular issues with \*ubuntu systems? The first time I looked at it was due to users that where not able to control their audio cards. What follows was always a permission issue. To be honest I have never seen such basic issues in other distro's