Installation of ubuntu in VirtualBox
https://linus.nci.nih.gov/bdge/installUbuntu.html
Enable clipboard in VM setting
Useful link: https://superuser.com/questions/42134/how-do-i-enable-the-shared-clipboard-in-virtualbox/42140
Install VBoxClient in the ubuntu and run it
Enable clipboard in ubuntu
22 sudo apt-get install xorg-video-abi-20
23 sudo apt-get install virtualbox-guest-x11
30 sudo VBoxClient --clipboard
useful link: https://askubuntu.com/questions/63420/how-to-fix-virtualboxs-copy-and-paste-to-host-machine