mount卡死无反应

执行mount命令一直卡着不动，可以把mount命令加上-v的参数，这样在控制台就能看到具体的报错信息，以方便排查解决问题。

加上后可以看到：

sudo mount -v -t nfs 192.168.110.45:/data /data
 
mount.nfs: timeout set for Tue Nov 21 12:22:47 2023
mount.nfs: trying text-based options 'vers=4.2,addr=192.168.110.45,clientaddr=192.168.110.192'

尝试使用 NFS 的其他版本进行挂载，如版本 3 ，解决

sudo mount -v -t nfs -o vers=3 192.168.110.45:/data /data
 
mount.nfs: timeout set for Tue Nov 21 12:23:50 2023
mount.nfs: trying text-based options 'vers=3,addr=192.168.110.45'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 192.168.110.45 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 192.168.110.45 prog 100005 vers 3 prot UDP port 37409