That's strange, I have the very same versions, yet mount still tries to find mount.nfs4 and fails:
[EMAIL PROTECTED]:~$ dpkg -l nfs-common Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-==============-==============-============================================ ii nfs-common 1.0.7-3ubuntu2 NFS support files common to client and serve [EMAIL PROTECTED]:~$ dpkg -l util-linux Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-==============-==============-============================================ ii util-linux 2.12r-4ubuntu6 Miscellaneous system utilities [EMAIL PROTECTED]:~# strace mount -t nfs4 -o sec=krb5,proto=tcp,port=2049 servername:/home/nfs/ /nfs/ ..... lstat64("/etc/mtab", {st_mode=S_IFREG|0644, st_size=484, ...}) = 0 stat64("/sbin/mount.nfs4", 0xbfc6d4c4) = -1 ENOENT (No such file or directory) rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV RTMIN RT_1], NULL, 8) = 0 mount("servername:/home/nfs/", "/nfs/", "nfs4", MS_POSIXACL|MS_ACTIVE|MS_NOUSER|0xec0000, 0x807bb20) = -1 EINVAL (Invalid argument) rt_sigprocmask(SIG_UNBLOCK, ~[TRAP SEGV RTMIN RT_1], NULL, 8) = 0 -- add NFSv4 support https://launchpad.net/bugs/27425 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs