# header_postinst.d/dkms exited with return code 4

## Error

`/etc/kernel/header_postinst.d/dkms:`  
`Error! Could not locate dkms.conf file.`  
`File:  does not exist.`  
`run-parts: /etc/kernel/header_postinst.d/dkms exited with return code 4`

## Lösung

```bash
for i in /var/lib/dkms/*/[^k]*/source; do [ -e "$i" ] || echo "$i";done
```

<p class="callout info">Output: `/var/lib/dkms/******-123/340.106/source`  
</p>

```bash
sudo rm -Rf /var/lib/dkms/******-123/340.106/source
sudo apt upgrade
```