I thought I said similar, but here's another example, chgrp root nosuchfile chgrp: cannot access 'nosuchfile': No such file or directory So the file system didn't find the file and chgrp reported it. So these are examples. -----Original Message----- From: Benjamin Coddington <bcodding@xxxxxxxxxx> Sent: Thursday, September 22, 2022 10:02 AM To: Alan Maxwell <amaxwell@xxxxxxxxx> Cc: linux-nfs@xxxxxxxxxxxxxxx Subject: Re: [EXTERNAL] nfsv4 client idmapper issue On 22 Sep 2022, at 10:50, Alan Maxwell wrote: > I would expect chgrp to behave similar to a local file system: > chgrp badgroupname junk > chgrp: invalid group: 'badgroupname' That's not the filesystem giving you that error, that's the chgrp binary trying to translate the argument into a gid.