ping - sends packets to a network host to check if it's online

Use ping host.

For example, ping google.com will send packets to Google’s servers to see if they’re responding.

• If you only want to try pinging the host a certain number of times, you can use ping -c count host. For example, ping -c 3 google.com will send 3 packets to Google’s servers and then stop.

• If you’re having trouble with your network and want to see if there’s a delay between packets, you can use ping -i seconds host. For example, ping -i 2 google.com will send packets to Google’s servers with a 2-second delay between them.

• If you don’t want to wait for your system to lookup a symbolic name for the address (like “google.com” to its IP address), you can use ping -n host. For example, ping -n 8.8.8.8 will send packets to Google’s public DNS server without performing a name lookup.

• Finally, if you want to see a message if no response is received, you can use ping -O host. For example, ping -O yahoo.com will send packets to Yahoo’s servers and will output a message if no response is received.