# "dev/ttyUSB0" port option greyed out

**URL:** <https://forum.arduino.cc/t/dev-ttyusb0-port-option-greyed-out/1294111>\
**Category:** Uploading\
**Created:** [August 21, 2024, 7:34pm UTC](https://forum.arduino.cc/t/dev-ttyusb0-port-option-greyed-out/1294111 "2024-08-21T19:34:12Z")\
**Posts on this page:** 1\
**Showing post:** 11

<div class="post-metadata">

**Author:** ![SurferTim](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/surfertim/32/1072341_2.png) [@SurferTim](https://forum.arduino.cc/u/SurferTim)\
**Post date:** [August 22, 2024, 10:40am UTC](https://forum.arduino.cc/t/dev-ttyusb0-port-option-greyed-out/1294111/11 "2024-08-22T10:40:21Z")

</div>

Have you looked for the file?  
What group is the owner and group?  
What permissions are set?  
Open a terminal and...

```arduino
cd /dev
ls -l

```

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_[View the full topic](https://forum.arduino.cc/t/dev-ttyusb0-port-option-greyed-out/1294111)._