problem using the dialout group

[Colin Law]

On Wed, 14 Jul 2021, 00:24 Dave Stevens, <geek at uniserve.com> wrote:

>
>  I have a serial device connected to a uart that is connected to a usb
> port. I can use it ok if I sudo but that is not what is wanted.
> Instead I'd like to be able to use it as the logged in user, which
> will always be dave. I was told to try adding dave to the dialout
> group, so:
>
> dave at dave-2021:~$ groups dave
> dave : dave adm dialout fax cdrom sudo dip plugdev lpadmin sambashare
>
> but this doesn't get me there. I'd like to copy incoming data to a
> file like this:
>
> dave at dave-2021:~$ groups dave
> dave : dave adm dialout fax cdrom sudo dip plugdev lpadmin sambashare
>
> dave at dave-2021:~$ cp /dev/ttyUSB0 data.bin
> cp: cannot open '/dev/ttyUSB0' for reading: Permission denied
>
> dave at dave-2021:~$ stat /dev/ttyUSB0
>   File: /dev/ttyUSB0
>   Size: 0             Blocks: 0          IO Block: 4096   character
> special file
> Device: 6h/6d    Inode: 526         Links: 1     Device type: bc,0
> Access: (0660/crw-rw----)  Uid: (    0/    root)   Gid: (   20/
> dialout)
> Access: 2021-07-13 15:09:54.718052674 -0700
> Modify: 2021-07-13 14:14:23.718052674 -0700
> Change: 2021-07-13 14:14:23.718052674 -0700
>  Birth: -
>
> suggestions?
>


If you have just added the user to the group have you logged out and in
again since then? In fact maybe reboot just to be certain.

Colin



> Dave
>
>
>
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