1. User space NFS server. This package contains all necessary programs to make your Linux machine act as an NFS server, being an NFS daemon (rpc.nfsd), a mount daemon (rpc.mountd). Unlike other NFS daemons, this NFS server runs entirely in user space. This makes it a tad slower than other NFS implementations, and also introduces some awkwardnesses in the semantics (for instance, moving a file to a different directory will render its file handle invalid). From Debian 3.0r0 APT