Here is another example, perhaps a bit clearer.
The ssh connection to the first Pi3 in the chain had dropped, so it was
re-establishing via a regular user login, then su was invoked and tip run:
.
To change this login announcement, see motd(5).
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Lately I've been playing with buildworld on a Pi3 running -current. The same
machine
acts as a terminal server for a second Pi3 also running -current in my
"cluster".
I ssh into the first Pi3, su to root and run tip to pick up a serial connection
to
the second Pi's console. Both machines are w
