ping command will usually try pinging a device forever, returning the response time after each pingback. If you want to ping a device once and use the answer to perform an action, use the following snippet:
ping -c 1 [your ip or hostname] > /dev/null
This command will either return 1 on failure or 0 on success.
In the example below, we use the
&& operator to perform an action if and only if the ping to “homeserver” was successful:
ping -c 1 homeserver >/dev/null && echo 'Successfully pinged device!'
This can be a great way to monitor the presence of a device on the network for a dead man’s switch for example.