gvs@bobby:~$ id
uid=1002(gvs) gid=1002(home) groups=4(adm),24(cdrom),25(floppy),29(audio),44(video),46(plugdev),105(scanner),106(admin),117(fuse),1001(netusers),1002(home),1004(media),1005(bobbyadmin),1006(ras)
gvs@bobby:~$ id hal
id: hal: No such user
gvs@bobby:~$ id haldaemon
uid=116(haldaemon) gid=116(haldaemon) groups=116(haldaemon),24(cdrom),25(floppy),46(plugdev)
gvs@bobby:~$ uname -a
Linux bobby 2.6.17-10-generic #2 SMP Fri Oct 13 18:45:35 UTC 2006 i686 GNU/Linux
gvs@bobby:~$
gvs@bobby:~$ id 4(adm), 24(cdrom) ,25(floppy) ,29(audio) ,44(video) ,46(plugdev) ,105(scanner) ,106(admin) ,117(fuse) ,1001(netusers) ,1002(home) ,1004(media) ,1005(bobbyadmi n),1006( ras) 116(haldaemon) ,24(cdrom) ,25(floppy) ,46(plugdev)
uid=1002(gvs) gid=1002(home) groups=
gvs@bobby:~$ id hal
id: hal: No such user
gvs@bobby:~$ id haldaemon
uid=116(haldaemon) gid=116(haldaemon) groups=
gvs@bobby:~$ uname -a
Linux bobby 2.6.17-10-generic #2 SMP Fri Oct 13 18:45:35 UTC 2006 i686 GNU/Linux
gvs@bobby:~$