在ubuntu开始挂载nas目录执行命令：
mount -t nfs 172.17.1.110:/volume1/nasshare /devnas
报如下错误：mount: /devnas: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program.
是因为没有安装 nfs-common
执行： apt-get install nfs-common
问题解决
