chore: diy nas progresses

knowledge base/openmediavault.md

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+# OpenMediaVault
+
+NAS solution based on [Debian Linux][debian].
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Make other users administrators](#make-other-users-administrators)
+1. [Remove access for the default admin user](#remove-access-for-the-default-admin-user)
+1. [Further readings](#further-readings)
+1. [Sources](#sources)
+
+## TL;DR
+
+```sh
+# Install OMV-Extras.
+wget -O - 'https://github.com/OpenMediaVault-Plugin-Developers/packages/raw/master/install' | bash
+```
+
+## Make other users administrators
+
+Just add the user to the `openmediavault-admin` group:
+
+```sh
+gpasswd -a 'me' 'openmediavault-admin'
+usermod -aG 'openmediavault-admin' 'me'
+```
+
+## Remove access for the default admin user
+
+Only do this **after** you created another user and [made it an admin][make other users administrators].
+
+From the safest to the less safe option:
+
+1. Lock the account:
+   ```sh
+   chage -E0 'admin'
+   ```
+1. Remove it from the `openmediavault-admin` group:
+   ```sh
+   gpasswd -d 'admin' 'openmediavault-admin'
+   deluser 'admin' 'openmediavault-admin'
+   ```
+1. Delete it completely:
+   ```sh
+   userdel -r 'admin'
+   deluser 'admin'
+   ```
+
+## Further readings
+
+- [Website]
+- [Debian]
+- [Proxmox]
+- [OMV-Extras]
+- [Disks maintenance]
+
+## Sources
+
+All the references in the [further readings] section, plus the following:
+
+- [How to lock or disable an user account]
+
+<!--
+  References
+  -->
+
+<!-- Upstream -->
+[omv-extras]: https://wiki.omv-extras.org/
+[website]: https://www.openmediavault.org/
+
+<!-- In-article sections -->
+[further readings]: #further-readings
+[make other users administrators]: #make-other-users-administrators
+
+<!-- Knowledge base -->
+[debian]: debian.md
+[disks maintenance]: disks%20maintenance.md
+[proxmox]: proxmox.md
+
+<!-- Others -->
+[how to lock or disable an user account]: https://www.thegeekdiary.com/unix-linux-how-to-lock-or-disable-an-user-account/