I cannot change my gateway. I have five locations (simulated) and i try to ping another of my locations but it says host unreachable and it is showing the gateway as the host i'm pinging withs ip address. I have tried the route command but I couldn't get it to work. Any suggestions on how to manually change my gateway to another address.

First, what UNIX OS do you have on these locations? Every one is a bit different in how it stores network information.

For Sun, you can edit the /etc/defaultrouter file to contain the IP address of your gateway.

Or you can mess around with the routing table and add or change your default route using something like this:

route add default <your gateway> <metric>

or

route change default <your gateway> <metric>

Check out the man page for route(1M) for more information.