[RHEL] Install virtualbox guest additions

install_vboxadd.sh

#!/usr/bin/env bash

if [[ -f "/etc/lsb-release" ]]; then
  apt-get --version
  sudo apt-get -y update
  sudo apt-get -y install gcc make
elif [[ -f "/etc/redhat-release" ]]; then
  if `dnf --version`; then
    sudo dnf -y update
    sudo dnf -y install gcc make
  elif `yum --version`; then
    sudo yum -y update
    sudo yum -y install gcc make
  fi
fi

vbga_ver="$(curl http://download.virtualbox.org/virtualbox/LATEST.TXT)"
curl http://download.virtualbox.org/virtualbox/${vbga_ver}/VBoxGuestAdditions_${vbga_ver}.iso -o /tmp/vbga.iso
sudo mount -t iso9660 /tmp/vbga.iso /mnt/
sudo /mnt/VBoxLinuxAdditions.run

virtualbox_guest_additions.sh

# Virtualbox -> Devices -> Install Guest Additions...
mount /dev/cdrom /mnt
/mnt/VBoxLinuxAdditions.run