Hosts file location for Mac OS X, Ubuntu Linux, and Windows XP

The "hosts" file is useful when you need to use ssh tunnels and stuff to mimic like the other server is publicly accessible.

The Mac OS X hosts file for your internet stuff is at

/private/etc/hosts

The Ubuntu Linux hosts file is usually at

/etc/hosts

The Windows XP hosts file is usually at

C:\WINDOWS\system32\drivers\etc\hosts