====== Serial Port ======

  * Use serial port as system console
    * ''System'' --> ''Administration'' --> ''Console''

===== Use as console =====

<code bash>
# fstat | grep ttyu
root     sh         21461 ctty /dev         68 crw-------   ttyu0 rw
root     sh         21461    0 /dev         68 crw-------   ttyu0 rw
root     sh         21461    1 /dev         68 crw-------   ttyu0 rw
root     sh         21461    2 /dev         68 crw-------   ttyu0 rw
root     login      76568 ctty /dev         68 crw-------   ttyu0 rw
root     login      76568    0 /dev         68 crw-------   ttyu0 rw
root     login      76568    1 /dev         68 crw-------   ttyu0 rw
root     login      76568    2 /dev         68 crw-------   ttyu0 rw
</code>

===== Use as serial port =====

Start terminal session on serial port:
[[https://www.freebsd.org/cgi/man.cgi?query=cu&sektion=1&manpath=freebsd-release-ports|cu(1)]]
<code bash>
cu -s 115200 -l /dev/ttyu0
</code>
To finish session:

  ~^D or ~.
	     Drop the connection and exit.  Only the connection	is dropped -
	     the login session is not terminated.