Vagrant 启动报错：the "vboxsf" file system is not available

default: Checking for guest additions in VM...

default: No guest additions were detected on the base box for this VM! Guest

default: additions are required for forwarded ports, shared folders, host only

default: networking, and more. If SSH fails on this machine, please install

default: the guest additions and repackage the box to continue.

default: This is not an error message; everything may continue to work properly,

default: in which case you may ignore this message.

default: Setting hostname...

default: Configuring and enabling network interfaces...

default: Mounting shared folders...

default: /vagrant => D:/opt/Vagrant/VWOS

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

sudo /etc/init.d/vboxadd setup