Following this for CentOS 7:
yum -y update kernel* reboot # Wait for reboot to complete. # Devices[menu] > Install Guest Additions mkdir /media/VirtualBoxGuestAdditions mount -r /dev/cdrom /media/VirtualBoxGuestAdditions yum -y install epel-release yum -y install gcc kernel-devel kernel-headers dkms make bzip2 perl KERN_DIR=/usr/src/kernels/$(uname -r) echo $KERN_DIR /usr/src/kernels/3.10.0-514.21.2.el7.x86_64 export KERN_DIR cd /media/VirtualBoxGuestAdditions ./VBoxLinuxAdditions.run reboot # theme vim # https://mediatemple.net/community/products/dv/204644480/enabling-vi-syntax-colors # http://www.vim.org/scripts/script.php?script_id=5390 # Paste your id_rsa.pub into .ssh/authorized_keys chmod 600 # diod in crontab crontab -e