//1. Create a Dirctory in /media/cdrom
sudo mkdir /media/cdrom

//2. Mount the CD-ROM
sudo mount /dev/cdrom /media/cdrom

//3. Change into the mounted directory
cd /media/cdrom

//4. Install the necessary dependencies
sudo apt-get install -y dkms build-essential linux-headers-generic linux-headers-$(uname -r)

//5. Change to the root user with the command
sudo su

//6. Install the Guest Additions package
./VBoxLinuxAdditions.run

//7. Reboot VM
reboot

//8. verify the Guest Additions installation was successful
lsmod | grep -io vboxguest

//9. view the details of module
modinfo vboxguest