[j-nsp] what is the frag meaning? and firewall, backspace

[Deric Kwok]

Hi

I get memory and have the result

What is meaning of frag?

Memory: allocated 31100400, left 101010010, frag 14, fail 0

How do I know this machine running good?

and how do I know the firewall is on in j router?

Any command line I can run

eg: ipfw -a list

How can I backspace when I type wrong in firewall?

Thank you