I need to search for files that has no user OR no group.
find / -nouser -o -nogroup
I think this is OK. But, I don't want to search NFS shares. How can I exclude the NFS shares in the find command?
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With GNU find, you can use the
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
-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 \)
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.