i was thinking if is it possible to cache some urls in bind?
As somebody else said, BIND doesn't cache URLs, but I suspect you are asking if it will cache zones. Yes, it will.
I just want to do when you send the command "ping domain.com" even if you are disconnected to the internet it will still resolve the ip of domain.com
Sure. It will keep it as long as the SOA in the zone tells it to live. For most zones, this is one day.
So, if you run a local caching nameserver and put 127.0.0.1 in your /etc/resolv.conf file it should be cached even if you are off-line.
Regards,
Pat