How can I enable remote terminal log in into Ubuntu 9.10 (Karmic Koala) using a USB serial port?
I created device /dev/ttyUSB0, and I want to allow logins using HyperTerminal.
I found some resources, but they are related to real hardware RS-232 ports. I can't find any information about a USB converter.
So far I have established connection between that USB-serial port and my laptop. I can send text to the port (cp sometext.txt /dev/ttyUSB0) and read it using HyperTerminal.
What do I need to do to enable logins on this port?
Best Answer
See the Ubuntu Serial Console HowTo. You'll need to adapt it for your hardware -- instead of ttyS0, which is the first hardware serial port, you'll need to use ttyUSB0. An example of this is below.
At minimum, you need to configure upstart to start a getty on that port.
Create
/etc/init/ttyUSB0.conf
and paste the following into it:Start the getty:
Older Ubuntu versions and distributions that don't use upstart do this by adding a line in /etc/inittab.
This doesn't consider changes to the bootloader configuration to allow Grub to talk to the serial port; refer to the HowTo for details. I'm not sure if Grub can talk to a USB serial port or if that's limited to hardware ports.