stop ping terminal commad

As far as i know, that is the correct command. Ctrl+C

You could always force quit Terminal.

 

You probably banged around enough to figure it out, but ^c means Control+C. The four-leaf-clover-y thing is the "Command Key". The one that is a poor depiction of a switch is the Option key.

 

I have wondered what that was supposed to be.

 

Or you could limit the number of pings you send by typing:
ping -c4 192.168.1.xxx
(replace the 4 with the number of ping requests you want to send, and put in the correct ip address, but I'm sure you've got that already!)

 

If it's behind a router, it could be actively denying a ping request which is quite standard.

 

Thank you. It help me

 

Many systems today turn on firewalls automatically. In that case they will simply not respond to pings unless you explicitly allow it. How to do that depends on the system, but if you have per-"application" rules, it may be called something like ICMP echo request or similar.

 

Cmd-. also emulates Ctrl-C, should you prefer it.

(It also also used to do things like cancel printing in OS 9 days, e.g. QuarkXPress used to tell you to press Cmd-. to cancel printing. I don’t know why they didn’t just provide a cancel button.)