When I try to open /dev/ttyUSB0 with serial-term, following permission error shows:

Opening serial port: Permission denied, /dev/ttyUSB0

I know I can add my user to a group that has access to /dev/tty*. Probably something like:

# sudo usermod -aG tty $(whoami)

However, Is there anyway to access /dev/ttyUSB0 within emacs (just put my password, whenever I access to serial ports, without changing my user groups). Perhaps something like run M-x serial-term with root privileges?

1 Answer 1


Yes, use TRAMP. There are likely dozens of other questions you can consult which document it, plus there is a manual you can read. You can also read it inside of Emacs by typing C-h i.

  • Could you explain little more? or tell me around which section of TRAMP should I read?
    – Garid
    Commented Mar 22, 2023 at 6:39

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