mount.nfs: access denied by server while mounting localhost:/home/xuwq/minilinux/system

在执行命令如下：

mount -t nfs localhost:/home/xuwq/minilinux/system /mnt

出现的错误：

mount.nfs: access denied by server while mounting localhost:/home/xuwq/minilinux/system

用以下的命令查看了日志，结果如下：

root@xuwq:/var/log# cat /var/log/syslog | grep mount
Dec  2 13:12:10 xuwq rpc.mountd[2987]: Caught signal 15, un-registering and exiting.
Dec  2 13:12:10 xuwq rpc.mountd[3635]: Version 1.2.8 starting
Dec  2 13:14:32 xuwq rpc.mountd[3635]: No host name given with /home/xuwq/minilinux/*(rw,sync,no_root_sqush) (ro,sync,wdelay,hide,nocrossmnt,secure,root_squash,no_all_squash,no_subtree_check,secure_locks,acl,anonuid=65534,anongid=65534), suggest *(ro,sync,wdelay,hide,nocrossmnt,secure,root_squash,no_all_squash,no_subtree_check,secure_locks,acl,anonuid=65534,anongid=65534) to avoid warning
Dec  2 13:14:32 xuwq rpc.mountd[3635]: refused mount request from 127.0.0.1 for /home/xuwq/minilinux/system (/): not exported
Dec  2 13:20:49 xuwq rpc.mountd[3635]: refused mount request from 127.0.0.1 for /home/xuwq/minilinux/system (/): not exported
Dec  2 13:22:10 xuwq rpc.mountd[3635]: refused mount request from 127.0.0.1 for /home/xuwq/minilinux/system (/): not exported
Dec  2 13:23:01 xuwq rpc.mountd[3635]: refused mount request from 127.0.0.1 for /root/gongxiang (/): not exported
Dec  2 13:24:43 xuwq rpc.mountd[3635]: refused mount request from 127.0.0.1 for /home/xuwq/minilinux/system (/): <span style="color:#FF0000;">not exported</span><u></u>

通过日志可以看出是因为/home/xuwq/minilinux/system目录没有被共享，通过对比/etc/export文件找出了原因，原来是/etc/export文件中的共享目录输入错误。

错误的/etc/exports文件内容：

# /etc/exports: the access control list for filesystems which may be exported
#               to NFS clients.  See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subt
ree_check)
#
# Example for NFSv4:
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)
#

<span style="color:#FF0000;">/home/xuwq/minilinux/*(rw,sync,no_root_sqush)</span>

正确的/etc/exports文件：

# /etc/exports: the access control list for filesystems which may be exported
#               to NFS clients.  See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subt
ree_check)
#
# Example for NFSv4:
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)
#

<span style="color:#FF0000;">/home/xuwq/minilinux/system/*(rw,sync,no_root_sqush)</span>

红色字体的为我的 共享目录。

重启nfs服务后再次执行如下命令，挂在成功：

mount -t nfs localhost:/home/xuwq/minilinux/system /mnt

使用df命令可以看到已挂在成功：

root@xuwq:/var/log# df
文件系统                                 1K-块     已用     可用 已用% 挂载点
udev                                    482076        0   482076    0% /dev
tmpfs                                    99888     5436    94452    6% /run
/dev/sda1                             37213744 13457468 21842832   39% /
tmpfs                                   499432      148   499284    1% /dev/shm
tmpfs                                     5120        4     5116    1% /run/lock
tmpfs                                   499432        0   499432    0% /sys/fs/cgroup
cgmfs                                      100        0      100    0% /run/cgmanager/fs
tmpfs                                    99888       32    99856    1% /run/user/119
tmpfs                                    99888        0    99888    0% /run/user/1000
<span style="color:#FF0000;">localhost:/home/xuwq/minilinux/system 37213824 13457536 21842944   39% /mnt</span>