Arduino Access Denied Ubuntu

Ubutnu Arduino 1.6.8
Resolve error: Arduino /dev/ttyACM0 : Permission denied error. Works on Ubuntu 14.04 15.04, Mint , Debian

• You need to add your user account to the linux group: dialout
•  After your in the group you need add permissions use the /dev/ttyUSB0
•  Reboot –
• After reboot open Arduino 1.6 and upload your new program – CHEERS

arduino__Permission_denied

HOW TO:

Open a Terminal window find out the user you need to add

Take note of the user name from the whoami command

Take note of the user name from the whoami command that is the user you need to add to the group dialout

example:
open termainal
whoami
$desktop:~$ johndoe

#****Next Add John Doe to dialout group and update permssion
sudo adduser johndoe dialout
sudo chmod a+rw /dev/ttyUSB0

Last step – Reboot computer
I know its Linux and its 2016 but sometimes a reboot is needed to ensure your permission update took place – reboot