ping — send ICMP ECHO_REQUEST to network hosts
This is one of the most important command every system administrator must know to handle a network. Packet InterNet Groper uses the ICMP protocol’s mandatory ECHO_REQUEST datagram to elicit an ICMP ECHO_RESPONSE from a host or gateway to find whether it is alive or not. See http://ftp.arl.mil/~mike/ping.html.
$ ping localhost — Resolve the IP for localhost and Ping it.
$ ping 127.0.0.1 — Ping for IP 127.0.0.1
$ ping -a host — Bell after every successful ping.
$ ping -b 192.168.1.255 — Ping the broadcast IP.
$ ping -c 6 host — Stop after sending 6 ECHO_REQUEST packets.
# ping -f host — Flood ping. Packets will generated with Zero inter packet time.
$ ping -i 5 host — Wait 5 seconds between sending each packet.
$ ping -q host — Quiet Mode. Only shows initial and end summary.
$ ping -R host — Record and print the route used by the packets.
$ ping -s 100 host — Sent 100 bytes ICMP packet. Default 56 Bytes.
$ ping -w 5 host — Ping for 5 Sec and Exit.