python: added manual installation guide source

wiki/audio.md

@@ -18,6 +18,8 @@ the corresponding [VoIP section](/wiki/communication.md#voip).
 Headphones have different frequency responses.
 [AutoEq](https://github.com/jaakkopasanen/AutoEq/tree/master) can be used to normalize these to a
 harman curve.
+AutoEq also has a [website](https://autoeq.app/) on which headsets can be searched and equalizer
+presets can be exported more easily.
 
 ## Media Software
 
@@ -25,6 +27,14 @@ If you want to keep your system clean of much data, you can use this kind of
 setup.
 There are differences depending on your preffered software interface.
 
+### Digital Audio Workstations
+
+Digital Audio Workstations - short DAWs - is an application that can be used to record, edit or
+produce audio files.
+
+- [LMMS](https://lmms.io/) is a free and cross-platform DAW that is highly compatible with
+  [Linux-based systems](/wiki/linux.md).
+
 ### Software for Music/Podcasts/Audiobooks
 
 The following is a list of server software, that is featured in this wiki.

wiki/nativefier.md

@@ -37,6 +37,22 @@ nativefier --name Mastodon \
 --single-instance https://mastodon.technology
 ```
 
+By default URLs that are not belonging to the one that is given by `--single-instance` will be
+blocked.
+There is an unchangeable whitelist.
+Single URLs that are not on the whitelist can be excluded and so not be blocked by using the
+`--internal-urls` flag.
+A complete example using this flag can look like the following.
+
+```sh
+nativefier --name Mastodon \
+--platform linux --arch x64 \
+--width 1024 --height 768 \
+--tray --disable-dev-tools \
+--internal-urls 'outlook.office365.com/*' \
+--single-instance https://mastodon.technology
+```
+
 ### Navigating Back and Forward
 
 In a normal [browser](/wiki/web_browser.md) there are buttons to navigate back and forth through

wiki/programming-languages/python.md

@@ -22,6 +22,50 @@ You can then set and install your preferred version of python globally with
 Analog to managing python versions, `pipenv` can manage pip and package versions.
 A guide and description of the usage can be found on [gioele.io](https://gioele.io/pyenv-pipenv).
 
+### Manual Installation
+
+This section is based on a guide by [Linuxize](https://linuxize.com/post/how-to-install-python-3-9-on-ubuntu-20-04/).
+
+On [Linux-based systems](/wiki/linux.md) Python can be easily installed using make.
+The following shows a process of installing Python 3.9.1.
+When another Python version is needed the version number has to be adapted accordingly.
+
+First make sure all the dependencies are installed.
+On a [Ubuntu](/wiki/linux.md#distributions) system or other systems using the apt
+[package manager](/wiki/linux/package_manager.md) this can look like the following
+
+```sh
+sudo apt update
+sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev libsqlite3-dev wget libbz2-dev
+```
+
+Afterwards the python source code can be downloaded.
+
+```sh
+wget https://www.python.org/ftp/python/3.9.1/Python-3.9.1.tgz
+tar -xf Python-3.9.1.tgz
+cd Python-3.9.1
+```
+
+Afterwards if OpenSSL should be enabled for Python uncomment all the corresponding lines in
+`Modules/Setup`.
+This part of the guide is taken from a
+[StackOverflow post by Ironman](https://stackoverflow.com/questions/58309485/modulenotfounderror-no-module-named-ssl).
+
+Then proceed with the installation.
+
+```sh
+./configure --enable-optimizations
+make
+sudo make altinstall
+```
+
+Afterwards you can check if the Pyhton version is installed using the following command.
+
+```sh
+python3.9 --version
+```
+
 ### Vim
 
 The steps to make Vim a python IDE are described in