According to YoLinux, group ID 10 typically belongs to wheel. And on my Arch Linux installation, sure enough there in /etc/group is wheel:10.However, on my Ubuntu machine instead I'm greeted with uucp. A quick search turns up the Ubuntu man page of uucp, which seems to have a different purpose.So why does uucp get that group ID? Can I replace it or should I just make wheel a different group ID instead?
Why does uucp take group 10?
group
The group ID number (GID) is not specifically hard-coded to a particular group. It's designated by the entries in the file /etc/group. On my Fedora 19 system, for example:$ head -15 /etc/grouproot:x:0:bin:x:1:daemon:x:2:sys:x:3:adm:x:4:logchecktty:x:5:disk:x:6:lp:x:7:mem:x:8:kmem:x:9:wheel:x:10:samlcdrom:x:11:mail:x:12:man:x:15:dialout:x:18:While on an Ubuntu system I have:$ head -15 /etc/grouproot:x:0:daemon:x:1:bin:x:2:sys:x:3:adm:x:4:mannytty:x:5:disk:x:6:lp:x:7:mail:x:8:news:x:9:uucp:x:10:man:x:12:proxy:x:13:kmem:x:15:dialout:x:20:But these are not set in stone. The numbers are what gets stored when files/directories are written to the filesystem. This file is what takes those numbers and display their corresponding name when you use commands such as ls -l.I would simply make the wheel group another entry in that file, and I'd use a command to add it. You can typically add entries using the addgroup or groupadd commands.Why is UUCP 10 then?This ordering is a by-product of when the system was either constructed (**NOTE: I'm talking about when these files were constructed by a particular distro's authors) or when the system went through the process of performing package adds/installs using its package manager (i.e. APT, RPM, pacman, etc.).References3 UNIX / Linux groupadd Command Examples