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Fix a dom0 package downgrade/reinstall commands #1417

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Fix a dom0 package downgrade/reinstall commands #1417

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37 changes: 4 additions & 33 deletions user/advanced-topics/how-to-install-software-in-dom0.md
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Expand Up @@ -65,44 +65,15 @@ commands to `dnf` using `--action=...`.
**WARNING:** Downgrading a package can expose your system to security
vulnerabilities.

1. Download an older version of the package:
To downgrade a specific package in dom0:

~~~
sudo qubes-dom0-update package-version
~~~

Dnf will say that there is no update, but the package will nonetheless be
downloaded to dom0.

2. Downgrade the package:

~~~
sudo dnf downgrade package-version
~~~
sudo qubes-dom0-update --action=downgrade package-version

## How to re-install a package

You can re-install in a similar fashion to downgrading.

1. Download the package:

~~~
sudo qubes-dom0-update package
~~~

Dnf will say that there is no update, but the package will nonetheless be
downloaded to dom0.

2. Re-install the package:

~~~
sudo dnf reinstall package
~~~
To re-install a package in dom0:

Note that `dnf` will only re-install if the installed and downloaded
versions match. You can ensure they match by either updating the package to
the latest version, or specifying the package version in the first step
using the form `package-version`.
sudo qubes-dom0-update --action=reinstall package

## How to uninstall a package

Expand Down