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du -sm /home/*take?/homeuse? You might find it more effective to use quotas for this, even if you don’t enforce limits.no_root_squashmeans that users can write their own suid binaries (something that otherwise only root can do), and I'm not sure which kind of access control you have, but allowing an NFS client to tell the NFS server that they are, in fact, requesting files on behalf of root, would basically allow any machine that users control to access all files, no matter who they belong to.