Grive is written in standard C++. Grive can be considered still beta quality. It simply downloads all the files in your Google Drive into the directory. After you make some changes to the local files, it will sync your changes back to your Google Drive. New files created locally or in Google Drive will be sync respectively. Deleted files will also be “removed”. Currently Grive will NOT destroy any of your files: it will only move the files to a directory named .trash or put them in the Google Drive trash. You can always recover them.
Install Grive and Grive Tools in Ubuntu 14.04
sudo add-apt-repository ppa:thefanclub/grive-tools
sudo apt-get update
sudo apt-get install grive grive-tools
After installation open Dash/menu and search for –Grive Setup- OR type sudo grive-setup in Terminal to configure Google Drive account for Grive.