# Configure USB Access Permissions (udev rules) on Ubuntu

{% embed url="<https://www.xmodulo.com/change-usb-device-permission-linux.html>" %}

```bash
lsusb
```

```bash
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 8087:0a2a Intel Corp. 
Bus 001 Device 002: ID 0483:5740 STMicroelectronics Virtual COM Port
Bus 001 Device 007: ID 045e:0b12 Microsoft Corp. Controller
Bus 001 Device 006: ID 045e:02ea Microsoft Corp. Xbox One S Controller
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
```

```bash
sudo nano /etc/udev/rules.d/50-xboxcontroller.rules
```

```bash
SUBSYSTEMS=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="02ea", GROUP="users", MODE="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="0b12", GROUP="users", MODE="0666"
```

```bash
sudo udevadm control --reload-rules
sudo udevadm trigger
```

### udev rule conventions

```
Files should be named xx-descriptive-name.rules, the xx should be
chosen first according to the following sequence points:

< 60  most user rules; if you want to prevent an assignment being
overriden by default rules, use the := operator.

these cannot access persistent information such as that from
vol_id

< 70  rules that run helpers such as vol_id to populate the udev db

< 90  rules that run other programs (often using information in the
udev db)

>=90  rules that should run last
```

### Some other useful commands

```bash
lsusb -t
```

```bash
udevadm info /dev/ttyACM0

udevadm monitor --subsystem-match=usb --property

udevadm test $(udevadm info -q path -n /dev/ttyACM0)
```

## References

{% embed url="<https://hackaday.com/2009/09/18/how-to-write-udev-rules/>" %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://tk233.gitbook.io/notes/tools/ubuntu/configure-usb-access-permissions-on-ubuntu.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.