How do I install Security Onion updates?

If you're behind a proxy server, make sure that you've configured your proxy server settings as shown here. Then run the following command (be sure to copy the entire line):

sudo -i "curl -L http://sourceforge.net/projects/security-onion/files/security-onion-upgrade.sh > ~/security-onion-upgrade.sh && bash ~/security-onion-upgrade.sh"