mount.nfs: access denied by server while mounting

所用linux系统为ubuntu13.10

问题1：在挂载NFS文件系统时 mount 192.168.18.3:/home/gzz/root_nfs /mnt

总出现mount.nfs: access denied by server while mounting 192.168.18.3:/home/gzz/root_nfs

防火墙也不关了，还是不行

解决：把/etc/exports文件中的网段限制去了，只剩一个*(rw,sync,no_root_squash)

/home/gzz/root_nfs *(rw,sync,no_root_squash)，就行了

问题2

执行/etc/init.d/nfs-kernel-server restart时，出现了

exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' specified for export "192.168.18.*:/home/gzz/root_nfs".
  Assuming default behaviour ('no_subtree_check').
  NOTE: this default has changed since nfs-utils version 1.0.x

解决：

把配置文件中的权限选项改成了*(rw,sync,no_subtree_check)

再重启NFS时

* Stopping NFS kernel daemon                                                                            [ OK ]
 * Unexporting directories for NFS kernel daemon...                                                      [ OK ]
 * Exporting directories for NFS kernel daemon...                                                        [ OK ]
 * Starting NFS kernel daemon                                                                            [ OK ]

就正常了

问题补充，但是no_subtree_check替换no_root_squash后，在开发板挂载NFS时挂载不成功，

解决，，又把no_root_squash加进去了，挂载成功了，即改为*(rw,sync,no_root_squash，no_subtree_check)