added various entries

minecraft: added mod guide to docker image
audio: added and linked openaudible
package managers: added version-specific installation of AUR and manual installation of PKGBUILD

wiki/audio.md

@@ -106,6 +106,18 @@ The corresponding client software is handled in the server softwares wiki entry.
   It is self-hostable and can be dockerized.
   It has a web-interface and does not feature client software.
 
+#### Obtaining Audio Files from Different Services
+
+[YouTube](/wiki/youtube.md) features a wide variety of uploaded music and audiobooks.
+Using programs like [yt-dl](/wiki/youtube.md#downloading-youtube-videos) they can be downloaded.
+
+[Audible](https://www.audible.de/) is a popular service that makes sells audibooks.
+After purchasing an audiobook it can be downloaded directly from Audible after navigating to the
+`Library` tab and selecting `Download`.
+Another option is to use [OpenAudible](/wiki/openaudible.md).
+This program features various functions to manage Audible audiobooks that include download,
+converting and splitting.
+
 ## Digitalizing and Analyzing Physical Mediums
 
 This section focusses on physical audio mediums like CDs, their digitalization to a digital audio

wiki/docker/itzg_-_minecraft-server.md

@@ -60,3 +60,21 @@ docker run --name minecraft \
     -e MOTD="Message of the day" \
     -d itzg/minecraft-server
 ```
+
+## Usage
+
+This section addresses the usage of the minecraft-server container.
+
+### Installation of Mods
+
+Mods can be installed as described in the
+[corresponding article of the official documentation](https://github.com/itzg/docker-minecraft-server/blob/master/docs/mods-and-plugins/index.md).
+Especially the `MODS` variable is noted.
+the variable can be set to the URL of a jar file, a container path to a jar file or a container
+path to a directory containing jar files.
+The following line shows an example that could be added to the [`rebuild.sh`](#rebuildsh) to 
+install some mods.
+
+```sh 
+-e MODS=https://www.example.com/mods/mod1.jar,/plugins/common,/plugins/special/mod2.jar
+```

wiki/linux/package_manager.md

@@ -15,6 +15,32 @@ yay is also a wrapper for pacman so yay can be used instead of pacman to
 install and update both AUR and main repository programs.
 It features the same syntax.
 
+### Usage
+
+This section addresses various usages of the arch linux package managers.
+
+#### Manual Installation of a `PKGBUILD` File
+
+A `PKGBUILD` file is a [shell](/wiki/linux/shell.md) script that contains the installation 
+information that is required by the Arch Linux.
+Using the `makepkg` command it can be installed like the following command shows.
+
+```sh
+makepkg -sirc
+```
+
+Afterwards it is installed on the system and can be further managed (especially uninstalled) by the
+Pacman package manager.
+
+#### Installing an AUR Program with a Specific Version
+
+The installation of a specific version of an AUR program can be easily achieved.
+For this navigate to the AUR page of the program to install.
+On the right-hand side click on `View Changes` and select the version you want to install in the
+commit list.
+Next to `download` a `.tar.gz` file can be downloaded which includes a `PKGBUILD` file.
+Afterwards it needs to be [uncompressed](/wiki/linux/tar.md#uncompressing-a-tar-archive).
+
 ### Troubleshooting
 
 This section addresses various errors that can happen when using the package managers yay and

wiki/linux/tar.md

@@ -0,0 +1,16 @@
+# tar
+
+tar is a package that acts a an archiving utility.
+
+## Usage
+
+This section addresses the usage of the tar package.
+
+### Uncompressing a tar Archive
+
+A tar archive (`.tar`, `.tar.gz`, etc.) can be uncompressed by running the following command.
+In this command `<tar archive>` stands in as a placeholder for the path of the tar archive. 
+
+```sh 
+tar -xf <tar archive>
+```

wiki/openaudible.md

@@ -0,0 +1,43 @@
+# OpenAudible
+
+[OpenAudible](https://openaudible.org/) is a cross-platform audiobook manager for the audible
+audiobook and podcast service.
+
+## Setup
+
+The software can be setup via installation files for [Windows](/wiki/windows.md), Mac and 
+[Linux](/wiki/linux.md) that are available on the
+[official website](https://openaudible.org/download).
+Linux distributions may aswell feature a package.
+
+After the installation the user has to connect OpenAudible with Audible.
+The `Connect to Audible` button is available under the `Controls` tab.
+
+## Usage
+
+This section describes various topics regarding the usage of OpenAudible.
+
+### Downloading, Converting and Splitting Audiobooks
+
+To download, convert or split an audiobook first make sure OpenAudible is connected with Audible as
+described in the [setup section](#setup).
+Also a library sync can be useful if the target audiobook doesn't show up in the list at the bottom
+of the window.
+A sync can be started by pressing the `Quick Audible Library Sync` button under the `Controls` tab.
+
+To download locate the audiobook in the list of audiobooks, right-click it and select `Download`.
+After the download it can be converted to `.mp3` or `.m4b` by selecting the corresponding option in
+the right-click menu.
+The same way the audiobook can be split.
+
+### Licensing and Avoiding It
+
+OpenAudible is a licensed product.
+The first year after installation the new versions can be downloaded and used without charge.
+However the versions that come out after this year are subject to the purchase of a license to use
+them.
+This means that the last version that was released before the end of the first year can be used
+indefinitely.
+This effectively lets the user use all features like
+[converting and splitting audiobooks](#downloading-converting-and-splitting-audiobooks) that are
+otherwise bound to a valid license.