Ubuntu on Virtual Box

To make full screen:

    Need to install "VirtualBox guest additions"  Using below steps:

• Load ISO file to CD drive
• File path & Name:
• C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso
• Load into VM CD Drive
• VM main app -> Setting -> Storage -> load iso into controller IDE
• Mount the ISO file:
• sudo mount /dev/cdrom /mnt
• Install the VirtualBox guest additions
• cd /mnt 
• sudo ./VBoxLinuxAdditions.run
• restart the VM
• Also changed the Display video memory to 128 as below:
• Go to virtual box main app
• Go to settings -> Display
• Change the video memory to 128 & click the "Enable 3d acceleration"
• After than change iinto full screen mode then only we can see full screen.

Copying between VM & Windows:

• Go to virtual box main-> setting -> general -> Advantage 
• In Shared Clipboard drop box, select bidirectional.