Ubuntu Client for Google Drive

Grive is the command-line tool, while Grive Tools give you the UI for setup. See http://www.thefanclub.co.za/how-to/ubuntu-google-drive-client-grive-and-grive-tools and http://www.lbreda.com/grive/installation http://www.webupd8.org/2012/05/grive-open-source-google-drive-client.html for reference. add-apt-repository is provided by the software-properties-common package.

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install grive

sudo add-apt-repository ppa:thefanclub/grive-tools
sudo apt-get update
sudo apt-get install grive-tools

For command line environment, first create the folder for sync, run "grive -a" in that folder and follow the link to get authenticate code. Paste the code and the data will sync. Use cron job for "automatic sync".