Another great tool for managing consoles on devices for simultaneous 
administration is "conserver" (previously conserver-GNAC):
I've managed many a Unix shop with conserver and serial consoles for 
remote rebuilds when necessary.
The initial question was how to relate to a serial port with bash. This 
is really devolving into "what other tools can I use to log collected 
data from a serial port".  Macy's suggestions are good ones.
-- - Ian C. Blenke <icblenke@nks.net>
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