1)用fuser杀掉占用那个目录的进程

linux:~ # fuser -k /home/msgplus/msgplus/remote_dir

2）强制umount

linux:~ # umount -f /home/msgplus/msgplus/remote_dir

3）重新挂载

linux:~ # mount -t nfs 193.168.168.85:/home/msgplusdata /home/msgplus/msgplus/remote_dir -o nolock

NFS挂载报如下错误信息：mount.nfs: Stale NFS file handle解决