user47796: I am having issues uploading to my Arduino from the IDE on Ubuntu 18.04. The error message I have received is:

Arduino: 1.6.10 (Linux), Board: "Arduino/Genuino Uno"
  avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied

I have checked other questions similiar to this one and have tried adding myself to the dialout group running:
sudo usermod -a -G dialout username

and added permission to write:
sudo chmod a+rw /dev/ttyUSB0

After, when I run:
ls -l /dev/ttyUSB0

I get:
crw-rw-rw- 1 username dialout 188, 0 jūl  2 16:09 /dev/ttyUSB0

However,I still get the same error message from the IDE.
Any help would be greatly appreciated!

user48274: When you run

ls -l /dev/ttyUSB0

you have
crw-rw-rw- 1 username dialout 188, 0 jūl  2 16:09 /dev/ttyUSB0

The Problem is you have the dev as <username>, try to change to as root
sudo chown root:dialout -R /dev/

Note:
One thing after your plug your USB, check your port with follow
ll /dev/tty*

if you can see my port as ttyUSB0 or with difference name (i.g ttyUSBx / ttyACMx ).
and then try to compile your sketch with following,
cd /path/your/arduino/installation/
$ARDUINO-DIR(pwd)
cd /path/your/sketch/
$ARDUINO-INO/arduino --verify sketch.ino --board arduino:avr:uno --port /dev/ttyUSB0 --verbose //compile your sketch.ino with arduino uno board.  


Hope this helps.

user47145: As mentioned on the official guide for Linux, you need to run
sudo usermod -a -G dialout <username>
with the <username> replaced with the username of your system.
After running this, log out and log in (or in some cases reboot the computer) and you should be good to go.

user54061: Arduino has added a script to the install to fix this problem.  I found it after much annoyance trying to get it to work with all these suggestions.
In the arduino-1.8.8-linuxarm.tar.xz file that you download is a script called arduino-linux-setup.sh
run that from commandline with your user name ./arduino-linux-setup.sh <username>
It'll ask for the root password, and then ask you to reboot.  After that you won't have any more port trouble.


47796: <p>I am having issues uploading to my Arduino from the IDE on Ubuntu 18.04. The error message I have received is:</p>

<blockquote>
  <p>Arduino: 1.6.10 (Linux), Board: "Arduino/Genuino Uno"
  avrdude: ser_open(): can't open device "/dev/ttyUSB0": Permission denied</p>
</blockquote>

<p>I have checked other questions similiar to this one and have tried adding myself to the dialout group running:</p>

<pre><code>sudo usermod -a -G dialout username
</code></pre>

<p>and added permission to write:</p>

<pre><code>sudo chmod a+rw /dev/ttyUSB0
</code></pre>

<p>After, when I run:</p>

<pre><code>ls -l /dev/ttyUSB0
</code></pre>

<p>I get:</p>

<pre><code>crw-rw-rw- 1 username dialout 188, 0 jūl  2 16:09 /dev/ttyUSB0
</code></pre>

<p>However,I still get the same error message from the IDE.</p>

<p>Any help would be greatly appreciated!</p>
 48274: <p>When you run</p>

<blockquote>
  <p>ls -l /dev/ttyUSB0</p>
</blockquote>

<p>you have</p>

<pre><code>crw-rw-rw- 1 username dialout 188, 0 jūl  2 16:09 /dev/ttyUSB0
</code></pre>

<p><strong>The Problem</strong> is you have <code>the dev</code> as <code>&lt;username&gt;</code>, try to change to as root</p>

<pre><code>sudo chown root:dialout -R /dev/
</code></pre>

<p><strong>Note:</strong></p>

<p>One thing after your plug your USB, check your port with follow</p>

<pre><code>ll /dev/tty*
</code></pre>

<p>if you can see my port as ttyUSB0 or with difference name (i.g ttyUSBx / ttyACMx ).<br>
and then try to compile your sketch with following,</p>

<pre><code>cd /path/your/arduino/installation/
$ARDUINO-DIR(pwd)
cd /path/your/sketch/
$ARDUINO-INO/arduino --verify sketch.ino --board arduino:avr:uno --port /dev/ttyUSB0 --verbose //compile your sketch.ino with arduino uno board.  
</code></pre>

<p><a href="https://i.stack.imgur.com/b6bbz.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/b6bbz.gif" alt="enter image description here"></a></p>

<p>Hope this helps.</p>
 47145: <p>As mentioned on the official <a href="https://www.arduino.cc/en/Guide/Linux/" rel="nofollow noreferrer">guide for Linux</a>, you need to run</p>
<p><code>sudo usermod -a -G dialout &lt;username&gt;</code></p>
<p>with the <code>&lt;username&gt;</code> replaced with the username of your system.
After running this, log out and log in (or in some cases reboot the computer) and you should be good to go.</p>
 54061: <p>Arduino has added a script to the install to fix this problem.  I found it after much annoyance trying to get it to work with all these suggestions.</p>

<p>In the arduino-1.8.8-linuxarm.tar.xz file that you download is a script called <code>arduino-linux-setup.sh</code></p>

<p>run that from commandline with your user name <code>./arduino-linux-setup.sh &lt;username&gt;</code></p>

<p>It'll ask for the root password, and then ask you to reboot.  After that you won't have any more port trouble.</p>

<p><a href="https://i.stack.imgur.com/iNMcc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/iNMcc.png" alt="terminal"></a></p>
