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extend cargo run troubleshooting section

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with the Linux variant of the error
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Jorge Aparicio 2020-07-16 14:00:18 +02:00
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2
embedded-workshop-book/src/SUMMARY.md
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- [`cargo-build` fails to link](./troubleshoot-cargo-build.md)
- [`dongle-flash` is not working](./troubleshoot-dongle-flash.md)
- [Dongle USB functionality is not working](./troubleshoot-usb-dongle.md)
- [USB error: Access denied](./troubleshoot-usb-error-access-denied.md)
- [`cargo run` errors](./troubleshoot-cargo-run.md)

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embedded-workshop-book/src/troubleshoot-cargo-run-error.md Normal file
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# `cargo run` errors
You may get one of these errors:
- "Access denied (insufficient permissions)" (seen on macOS)
- "USB error while taking control over USB device: Resource busy" (seen on Linux)
``` console
$ cargo run --bin usb-4
Running `dk-run target/thumbv7em-none-eabi/debug/usb-4`
Error: An error specific to a probe type occured: USB error while taking control over USB device: Access denied (insufficient permissions)
Caused by:
USB error while taking control over USB device: Access denied (insufficient permissions)
```
``` console
$ cargo run --bin usb-4
Running `dk-run target/thumbv7em-none-eabi/debug/usb-4`
Error: An error specific to a probe type occured: USB error while taking control over USB device: Resource busy
Caused by:
USB error while taking control over USB device: Resource busy
```
All of them have the same root issue: You have another instance of the `cargo run` process running.
It is not possible to have two or more instances of `cargo run` running. Terminate the old instance before executing `cargo run`. If you are using VS Code click the garbage icon ("Kill Terminal") on the top right corner of the terminal output window (located on the bottom of the screen).

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embedded-workshop-book/src/troubleshoot-usb-error-access-denied.md
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## USB error while taking control over USB device: Access denied (insufficient permissions)
If you get this Error when trying to run a different process, check if the old process is still running. If this is the case, end it. Try again.