The program calls "uptime" on the remote hosts and grabs the "last 1 minute"
counter from the command's output. It then uses the user specified (or hardwired,
if no parameters are passed) thresholds to decide if it should emit a "yellow"
or a "red" condition.
The parameter line should be in the format:
hostname!yellow_threshold!red_threshold
Conditions under "yellow_threshold" will always be flagged as "green".
System loads between "yellow_threshold" and "red_threshold" will be yellow.
Anything above "red_threshold" will generate a "red" condition.