vagrant无法挂载共享文件夹

vagrant up之后出现错误
Failed to mount folders in Linux guest. This is usually because
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

mount -t vboxsf -o uid=`id -u vagrant`,gid=`getent group vagrant | cut -d: -f3` vagrant /vagrant
mount -t vboxsf -o uid=`id -u vagrant`,gid=`id -g vagrant` vagrant /vagrant
看到一个解决办法:
sudo apt-get install virtualbox-guest-utils
然后reload vagrant 原文链接:http://www.bubuko.com/infodetail-666751.html