How to enable IP Forwarding in Mac OS X

Another note to self: how to enable IP forwarding in Mac OS X:

sudo sysctl -w net.inet.ip.forwarding=1

(credit: Stack Exchange)

How to get a List of Installed JVMs on a Mac

I got this tip from a fellow worker:

$ /usr/libexec/java_home -V

This command will get you the list of installed Java Virtual Machines installed on your Mac OS X system.