Take the tour ×  I am working in a lab with three Ubuntu
systems, and I would like to cross-mount some filesystems via
NFS. However, while the systems have some of the same usernames,
the UIDs and GIDs don't match, because the three systems were
set up separately. When I mount an NFS filesystem from one
system to another, the ownership shows up wrong. For example, if
UID 1000 is alice on server1 and the same UID, 1000, is bob on
server2, then when server1 mounts server2's exported filesystem,
bob's files appear to be owned by alice.  So Is there any way to
make NFS (v4) convert UID's between servers via their associated
user names? Googling for this, I've seen lots of references to
Kerberos, LDAP, or NIS, which seems like massive overkill for
such a simple task, and might not be possible since these
systems are not centrally-managed. This link seems to indicate
that what I ask is impossible. Is it correct?  Edit: I've tried
every configuration for /etc/idmapd.conf that I can think of or
find on the internet,