In my network there is a special user group with the ID 101. Unfortunatelly, Debian wants to use the ID 101 for the group systemd-journal.

Since it exists only locally, I assigned systemd-journal the group ID 99 and so I was able to have our special user group 101. I know this is asking for trouble, but the alternative is using a distro where group ID 101 is not used by the OS.

Every time something/-one calls dpkg-reconfigure systemd there is an error, b/c dpkg is unhappy about the GID change. In these cases I switch the GID of systemd-journal back to 101, do the reconfigure and then switch it to 99 again.

This is so much manual work, I was wondering: How can I make dpkg accept the GID change of systemd-journal to 99? Can I make it ignore this problem?

  • Alternatively: You maybe able to map the GID of the network share to a different (reserved) number, when you mount it. Commented Apr 13, 2019 at 18:57
  • @ctrl-alt-delor When mounting a share I can do a gid mapping of an arbitrary id to another arbitrary id? Will this leave other group-ownerships intact? How can I do that?
    – Bananguin
    Commented Apr 13, 2019 at 19:04
  • Yes, I think so. You should reserve a GID for it. However I am not the person to ask, as I have only seen it in the manual, but not done it, or remember where in the manuals. (I would start with looking at the mount manual). Commented Apr 13, 2019 at 19:28
  • @ctrl-alt-delor I did before writing my comment. It's not there. I only thing I was able to find quickly is that with NFS4 I can set the GID of the nobody group when mounting a share. I'd rather not overload the nobody group.
    – Bananguin
    Commented Apr 13, 2019 at 19:31
  • 1
    This may help unix.stackexchange.com/a/158695/4778 Commented Apr 13, 2019 at 19:33

1 Answer 1


You can use a different gid for systemd-journal, but it has to be in the system group range, which by default is 100–999. You could extend the range to include 99, by editing adduser.conf, but that would be a bad idea because groups 0–99 are allocated statically.

So you can’t easily make 99 acceptable as a gid for systemd-journal, but you can use another gid such as 999. Another approach could be to configure adduser.conf to specify a system range which is safe on your network, say 200–999, before the first system group is created.

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