This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Debian Linux: Enable a Serial Console ====== Edit service: <code>nano /etc/systemd/system/getty.target.wants/serial-getty@ttyS0.service</code> Find the line starting with ExecStart, make a copy and comment it out (as a backup / retreat path), then edit the active line. Remove --keep-baud and perhaps also leave just your one desired baud rate = reduce the comma-separated list to a single item. Like this: <code>#ExecStart=-/sbin/agetty -o '-p -- \\u' --keep-baud 115200,57600,19200,9600 %I $TERM ExecStart=-/sbin/agetty -o '-p -- \\u' 115200 %I $TERM</code> Note: you have hereby edited a systemd unit file. You will need to tell the systemd superdaemon to reload it. (If you forget to do this, systemctl will suggest you to do it.) <code>systemctl daemon-reload</code> Time to start the already altered service unit: <code>systemctl start serial-getty@ttyS0 systemctl status serial-getty@ttyS0</code> To test if it works, use your favourite terminal emulator. An example how to start minicom: <code>minicom -b 115200 -D /dev/ttyS0</code> To enable screen while system is loading, need to enable it in GRUB bootloader: <code>nano /etc/default/grub</code> Edit or append lines: <code>GRUB_CMDLINE_LINUX='console=tty0 console=ttyS0,115200n8' GRUB_TERMINAL=serial GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"</code>{{:screenshot_2024-11-04_14-52-34.jpg?400|}} Then update Grub <code>update-grub</code> ====== Connect ====== When connecting from another Linux, can use minicom <code>apt install minicom</code> Detect connection <code>ls /dev/tty*</code> For example, /dev/ttyUSB0 Then connect to remote PC <code>minicom -b 115200 -D /dev/ttyUSB0</code> == P.s == I prefer to use byobu as failsafe if have problems to exit minicom <code>apt install byobu</code> Sources: [[https://www.reddit.com/r/linuxquestions/comments/s6m11l/how_to_enable_serial_with_debian_11/|Reddit]] [[https://www.cyberciti.biz/faq/howto-setup-serial-console-on-debian-linux/|cyberciti.biz]]
