Table of Contents

Serial Port

Use as console

# 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

Use as serial port

Start terminal session on serial port: cu(1) 

cu -s 115200 -l /dev/ttyu0

To finish session: 

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