Check what kind of hypervisor is running in a VM

If you are unsure of what virtualization layer you are running, you can run 'virt-what' command

[root@sample-box]# virt-what

xen

xen-hvm

If you are running 'vmware', your output will be similar to what is shown in this link

Vagrant up error on virtuabox 5.0.16

After cloning a vagrant box, vagrant up resulted in the below error:-

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`,dmode=777,fmode=777 vagrant /vagrant

mount -t vboxsf -o uid=`id -u vagrant`,gid=`id -g vagrant`,dmode=777,fmode=777 vagrant /vagrant

The error output from the last command was:

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

Steps to resolve the issue was found in vagrant discussion board - https://github.com/mitchellh/vagrant/issues/3341

Resolution:-

1. On vagrant host - $vagrant plugin install vagrant-vbguest

2. $vagrant ssh

3. On guest box - $sudo ln -s /opt/VBoxGuestAdditions-5.0.16/lib/VBoxGuestAdditions /usr/lib/VBoxGuestAdditions

4. vagrant reload