-Follow the below guides, and check their versions match [required external dependencies versions](https://github.com/Chocobozzz/PeerTube/blob/master/package.json#7). You can check them automatically via `sudo npx engineslist`.
+Follow the below guides, and check their versions match [required external dependencies versions](https://github.com/Chocobozzz/PeerTube/blob/master/engines.yaml). You can check them automatically via `sudo npx engineslist`.
[https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
4. Install yarn, and be sure to have [a recent version](https://github.com/yarnpkg/yarn/releases/latest):
[https://yarnpkg.com/en/docs/install#linux-tab](https://yarnpkg.com/en/docs/install#linux-tab)
[https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
4. Install yarn, and be sure to have [a recent version](https://github.com/yarnpkg/yarn/releases/latest):
[https://yarnpkg.com/en/docs/install#linux-tab](https://yarnpkg.com/en/docs/install#linux-tab)
_from [PostgreSQL documentation](https://www.postgresql.org/download/linux/redhat/):_
> Due to policies for Red Hat family distributions, the PostgreSQL installation will not be enabled for automatic start or have the database initialized automatically.
```
# PostgreSQL
_from [PostgreSQL documentation](https://www.postgresql.org/download/linux/redhat/):_
> Due to policies for Red Hat family distributions, the PostgreSQL installation will not be enabled for automatic start or have the database initialized automatically.
```
# PostgreSQL