must be root to alter routing table

[Dr Trevor J. Hutley]

At 14:02 -0500 14/12/03, Wesley Griffin wrote:
>Here's what you want:
>
>route add default xxx.xxx.xxx.x
>
>specifying your firewall IP for <router ip>.

Wesley - so, from Terminal, I typed the above command (but with my 
firewall IP address, which I have not included for security reasons), 
and got the message "must be root to alter routing table".

I clearly need to do something else to identify myself as "root", but 
I am not sure what it is !

Could you advise ?  Thanks.  Sorry to trouble you, but I am so close, 
yet so far.

regards,  Trevor