View serial port information under Linux

  1. View the serial port name:

ls -l /dev/ttyS*

  2. View the serial device name:

dmesg | grep ttyS*

  Neither of the above two commands requires root privileges.
  The first command outputs the main serial port, mine outputs /dev/ttyS0, the
  second command outputs all serial port information, mine also outputs two USB information

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