1.重启要求重新安装系统
2.mount 挂载报错:
mount: /mnt/share: wrong fs type, bad option, bad superblock on /mnt/share, missing codepage or helper program, or other error.
sudo apt install nfs-common
sudo apt install cifs-utils
sudo apt-get install virtualbox-guest-utils
以上三个命令就可以解决。