> Am 20.04.2016 um 15:59 schrieb Charles Plessy: > > The only other explanation I could offer is either a bug in adduser > (unlikely) or someone modified /etc/adduser.conf and a system users > suddenly fell in a non-system-user uid range.
Bingo :) I had to make the following change on that machine, to prevent clashes with GIDs on an old NFS share. --- a/adduser.conf +++ b/adduser.conf @@ -28,10 +28,10 @@ SKEL=/etc/skel # Please note that system software, such as the users allocated by the base-passwd # package, may assume that UIDs less than 100 are unallocated. FIRST_SYSTEM_UID=100 -LAST_SYSTEM_UID=999 +LAST_SYSTEM_UID=499 -FIRST_SYSTEM_GID=100 -LAST_SYSTEM_GID=999 +FIRST_SYSTEM_GID=302 +LAST_SYSTEM_GID=499 I thought that it would only restrict the range of newly attributed GIDs, not invalidate existing "system" GIDs. Anyway, many thanks for your answers. I hope that this bug record will be useful to other people in the same situation. Have a nice Sunday, -- Charles Plessy Tsurumi, Kanagawa, Japan