On 2016-08-15 01:09:20 +0200 (+0200), Martin Bammer wrote: [...] > I thought that the IDs for system services are fixed. Static ID > mapping is a nice idea which would be helpful for system services. [...]
Some of them are fixed: https://wiki.debian.org/SystemGroups There are compiled-in defaults for SYS_GID_MIN and SYS_UID_MIN of 100 so GIDs and UIDs you see lower than that are fixed assignments. Red Hat/Fedora have been continuing to add to the list on their distros over the years, and have to explicitly bump these minimums in /etc/login.defs as they eventually grew past 100: https://git.fedorahosted.org/cgit/setup.git/tree/uidgid -- Jeremy Stanley
