Regarding the search for mount.nfs4 - mount does this, but it appears earlier in the strace, so it's not visible above.
Here's the relevant strace fragment: .... lstat64("/etc/mtab", {st_mode=S_IFREG|0644, st_size=484, ...}) = 0 stat64("/sbin/mount.nfs4", 0xbf81582c) = -1 ENOENT (No such file or directory) gettimeofday({1173993365, 294378}, NULL) = 0 getpid() = 6800 open("/etc/resolv.conf", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=149, ...}) = 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