编译MT7620n NFS文件系统

做嵌入式开发，经常需要Download文件到开发板，一般文件少时，可以用tftp。可是，文件比较多时，tftp就不是很方便了。NFS可以很好的解决这个问题。

下面就以MT7620N为例，编译嵌入式NFS文件client.

1.Kernel配置

File system -->
    Pseudo filesystems -->
        Virtual memory file system support(former shm fs)
        Tmpfs POSIX Access Control Lists
    Network File System -->
        NFS client support
        NFS client support for NFS version 3
        NFS client support for the NFSv3 ACL
        Secure PRC:kerberos V mechanism

2.busybox配置

Linux System Utilities -->
    mount
    support mounting NFS file systems
    support lots of -o flags in mount

挂载命令：mount -t nfs serverip:/nfs文件夹 /tmp -o nolock