Can't see second Arduino port on Ubuntu I have connected two arduinos to /etc/ttyUSB0 and /etc/ttyUSB1.

Only one is visible in Arduino IDE. Why and how to force second?

UPDATE

$ ls -l /dev/serial/by-id
total 0
lrwxrwxrwx 1 root root 13 Jan  6 23:32 usb-1a86_USB2.0-Serial-if00-port0 -&gt; ../../ttyUSB1


I.e. it shows port, which IS NOT SHOWN in Arduino IDE (only /dev/ttyUSB0 is shown.

ALSO

I can see both ports if run arduino with sudo. Should I run it with sudo?

Permissions are same

$ ls -l ttyUSB?
crw-rw-rw- 1 root dialout 188, 0 Jan  6 23:26 ttyUSB0
crw-rw-rw- 1 root dialout 188, 1 Jan  6 23:39 ttyUSB1
You have to add use your user to the dialout group, as explained in the installation instructions for Linux.

sudo usermod -a -G dialout $USER


Then log out and back in again.