5: Network Connectivity
“No Man Is An Island” — said John Donne
Ditto that for Linux servers…
There are two classes of Argent checks for Linux servers connectivity: The cheap and The effective.
The cheap is a simple ping. Use NDE_TCPIP_PING.
The effective is SCP_ LINUX_WRITE_CYCLE. This Argent Rule creates a small text file, reads out its contents comparing them to the ones written, and then deletes it.
See Also: Why is a Ping Close to Useless?