ping internet.address
Ping sends a series of "ping" packets to a remote host specified by internet.address which should bounce these packets back to ping to verify that the machine recieved them and to test how long it takes for packets to make the round trip. Ping by default will not exit, so it must be exited by pressing Ctrl-C.

Example:
  1. Testing the status of judy from thunder:
    mama:~> ping judy
    PING judy.indstate.edu (139.102.14.10): 56 data bytes
    64 bytes from 139.102.14.10: icmp_seq=0 ttl=253 time=5.8 ms
    64 bytes from 139.102.14.10: icmp_seq=1 ttl=253 time=1.6 ms
    64 bytes from 139.102.14.10: icmp_seq=2 ttl=253 time=1.6 ms

    --- judy.indstate.edu ping statistics ---
    3 packets transmitted, 3 packets received, 0% packet loss
    round-trip min/avg/max = 1.6/3.0/5.8 ms