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List:       fedora-list
Subject:    Re: F38 adding user to dialout group without reboot
From:       "T.C. Hollingsworth" <tchollingsworth () gmail ! com>
Date:       2023-12-05 3:46:43
Message-ID: CAJVv0Okve26LhDLn2y7jeFXfTyWuVY6LVx74m6oFeT5pWexyxQ () mail ! gmail ! com
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On 12/4/23, Robert Moskowitz <rgm@htt-consult.com> wrote:
> I have added me to group dialout:
>
> $ groups rgm
> rgm : rgm wheel dialout
>
> But I cannot access /dev/ttyUSB0
>
> screen /dev/ttyUSB0 115200
>
> Does not work but:
>
> sudo screen /dev/ttyUSB0 115200
>
> does.
>
> Dr. Google seems to think I need a reboot for this to work.  I have too
> many things running to want to reboot.
>
> Actually I am trying to get the Arduino IDE stuff to work and it wants
> to use the ttyUSB0 and gets permissions denied.
>
> Is rebooting the only option?

You can invoke the `newgrp` command to enable a new group without
logging out or obtaining a new login shell via `sudo` or the like:

$ newgrp dialout

https://linux.die.net/man/1/newgrp
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