How to exclude NFS directories with find?

The closest you will probably get is to use -xdev , which means "Don't descend directories on other filesystems." Then you'll need to specify which filesystems you do want to search.

With GNU find, you can use the -fstype predicate:

find / -fstype nfs -prune -o \( -nouser -o -nogroup \) -print

Having said that, hymie's approach probably makes more sense: white-list what FS you want to search rather than black-listing those that you don't want to search.

If you want to only include jfs2 file systems (assuming / is on jfs2), then, you need to write it:

find / ! -fstype jfs2 -prune -o \( -nouser -o -nogroup \) -print

Don't write it:

find / -fstype jfs2 \( -nouser -o -nogroup \) -print

As while that would stop find from printing files in non-jfs2 filesystem, that would not stop it from crawling those non-jfs2 filesystems (which you need -prune for).

Note that -a (AND which is implicit if omitted) has precedence over -o (OR), so you need to watch whether parenthesis are needed or not.

The above correct command is short for:

find / \( \( ! -fstype jfs2 \) -a -prune \) -o \
  \( \( -nouser -o -nogroup \) -a -print \)