setserial:tldr:952d3

The command setserial -a ${-dev-cuaN} is used to display the current configuration of a serial device.

Here's an explanation of each part of the command:

• setserial: This is the command itself, used to configure serial port settings in Linux.
• -a: This option is used to display all the current settings and configuration of the specified serial device.
• ${-dev-cuaN}: This is a placeholder for the actual device name. The -dev-cuaN is used to denote a particular serial device. The N represents the number of the serial port, starting from 0. For example, if you want to check the configuration of ttyS0 (COM1 in Windows), you would replace ${-dev-cuaN} with /dev/ttyS0.

So, the command setserial -a ${-dev-cuaN} with the appropriate device name will display information such as the device type, IRQ, I/O port addresses, baud rate, parity, stop bits, etc., providing a comprehensive overview of the serial device configuration.