Install statserial by entering the following commands in the terminal:
sudo apt update sudo apt install statserial
Description:
Displays serial port modem status lines
Statserial displays a table of the signals on a standard 9-pin or 25-pin serial port, and indicates the status of the handshaking lines. It can be useful for debugging problems with serial ports or modems.
Homepage: http://www.oocities.org/jefftranter@rogers.com/
Version: 1.1-23
Section: universe/utils