How to Find Out If a Remote System Is Operating
Find out if a remote system is operating by using the ping command.
$ ping system-name | ip-address |
- system-name
-
The name of the remote system
- ip-address
-
The IP address of the remote system
The ping command returns one of three messages:
|
Status Message |
Explanation |
|---|---|
|
system-name is alive |
The system can be accessed over the network. |
|
ping: unknown host system-name |
The system name is unknown. |
|
The system is known, but is not currently operating. |
If the system you “ping” is located in a different domain, the return message can also contain routing information, which you can ignore.
The ping command has a timeout of 20 seconds. Effectively, if it does not receive a response within 20 seconds, it returns the third message. You can force ping to wait longer (or less) by typing a time-out value, in seconds:
$ ping system-name | ip-address time-out |
For more information, see ping(1M).
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