Info taken from https://ubuntu.com/tutorials/install-the-arduino-ide#4-the-dialout-group

To access the /dev/ttyACM* just add the unpriveldged user to dailout group.

ls -l /dev/ttyACM*
Example:

crw-rw---- 1 root dialout 166, 0 Des 14 09:47 /dev/ttyACM0