报错详情：

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

The error output from the last command was:

/sbin/mount.vboxsf: mounting failed with the error: No such device

网上差了半天，谷歌上说是

VBoxGuestAdditions-4.3.10 版本问题ln -s /opt/VBoxGuestAdditions-4.3.10/lib/VBoxGuestAdditions /usr/lib/VBoxGuestAdditions虚拟机上的是VBoxGuestAdditions-4.3.12/lib/VBoxGuestAdditions，执行后还是报原错误后来在虚拟机上执行sudo /etc/init.d/vboxadd setup然后windows下执行vagrant reload