错误如下：

mount: wrong fs type, bad option, bad superblock on 192.168.1.7:data/nfsdir2,
       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.

　　解决办法：

Centos ：

yum install nfs-utils

Ubuntu：

sudo apt-get install nfs-common