I have an Ubuntu 11.10 system with 2 users:
- The first was created during the installation
- The second instead was created after. It belongs to the sudoers group.
Now the problem is that when the second tries to use a device
ttyUSB0 the following error is returned:
"Could not open serial port /dev/ttyUSB0"
I was able to fix it by using:
sudo chown :second_user /dev/ttyUSB0
However when I disconnect the device and reconnect it the problem comes back.
Is there a way to allow different users to access the devices?
I suppose I have to add the user to a specific group. Currently the owner is
root and the group is
dialout. However I'm not sure about the group and I don't know how to add the user.