ubuntu里设置从串口登录

1) Create a file called /etc/init/ttyS0.conf containing the following:

# ttySAC0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.

start on stopped rc or RUNLEVEL=[2345]
stop on runlevel [!2345]

respawn
exec /sbin/getty -L 115200 ttySAC0 vt102

2) Ask upstart to start the getty

sudo start ttySAC0