https://download.virtualbox.org/virtualbox/6.1.4/VirtualBox-6.1-6.1.4_136177_el7-1.x86_64.rpm

https://releases.hashicorp.com/vagrant/2.2.7/vagrant_2.2.7_x86_64.rpm

https://vagrantcloud.com/centos/boxes/7/versions/1902.01/providers/virtualbox.box

share folder error

Vagrant was unable to mount VirtualBox shared folders. This is usually because the filesystem "vboxsf" is not available. This filesystem is made available via the VirtualBox Guest Additions and kernel module. Please verify that these guest additions are properly installed in the guest. This is not a bug in Vagrant and is usually caused by a faulty Vagrant box. For context, the command attempted was: mount -t vboxsf -o nolock,vers=3,udp,noatime,actimeo=2,fsc,uid=1000,gid=1000 core /vagrant T

vagrant plugin install vagrant-vbguest

if stoped

https://blog.csdn.net/hedy5566/article/details/79228570

vagrant plugin install vagrant-vbguest --plugin-source=https://gems.ruby-china.org/