The ruptime utility gives a status line like uptime (see uptime(1)) for
each machine on the local network; these are formed from packets broadcast
by each host on the network approximately every three minutes.
Machines for which no status report has been received for 11 minutes
are shown as being down.
Normally, the listing is sorted by host name, but this order can be
changed by specifying one of the options listed below.
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