錯誤：

[[email protected]]# mount -t nfs 192.168.0.66:/opt/data /home/hadoop/disk
mount: wrong fs type, bad option, bad superblock on 192.168.0.66:/opt/data,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type> helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

解決過程：

根據錯誤提示，檢視/sbin/mount.<type>檔案，果然發現沒有/sbin/mount.nfs的檔案，安裝nfs-utils即可

解決辦法：

apt-get install nfs-common

或者

yum install nfs-utils

安裝之後，/sbin/下面多了兩個mount檔案，分別是mount.nfs和mount.nfs4：

-rwsr-xr-x   1 root root  123648 7月  24 16:22 mount.nfs
lrwxrwxrwx   1 root root       9 12月  3 15:09 mount.nfs4 -> mount.nfs
-rwxr-xr-x.  1 root root    1338 2月  22 2013 mount.tmpfs