fixed typos

wiki/linux/kernel.md

@@ -0,0 +1,39 @@
+# Kernel
+
+The [Linux](/wiki/linux.md) kernel is an open-source Unix-like computer operating system kernel.
+
+## Versions
+
+There are a few possible kernel version.
+
+### Stable-Version: `linux`
+
+The stable version of the [Linux](/wiki/linux.md) kernel can usually be found in a package called
+`linux` and is usually installed from the start or in the recommended setup.
+
+### Zen-Version: `linux-zen`
+
+The zen kernel is a collaborative project of kernel hackers to provide the best
+[Linux](/wiki/linux.md) kernel for everyday systems.
+Especially the response time of the system under load
+[is said to be better](https://github.com/zen-kernel/zen-kernel/wiki/Detailed-Feature-List#zen-kernel-improvements).
+This will - for example - make the system less stuttery when something is compiled.
+Desktop and gaming systems will benefit the most.
+
+To setup the zen kernel do the following. Firstly install the packages `linux-zen` and
+`linux-zen-header`.
+Afterwards open the file `boot/loader/entries/arch.conf` and change the following lines. 
+
+```txt 
+linux /vmlinuz-linux
+initrd /initramfs-linux.img
+```
+
+To look like the following lines.
+
+```txt
+linux /vmlinuz-linux-zen
+initrd /initramfs-linux-zen.img
+```
+
+Afterwards the system should be rebooted for the change to take effect.

wiki/linux/package_manager.md

@@ -131,3 +131,17 @@ pacman-key --refresh-keys
 The error `the following untracked working tree files would be overwritten` can happen when the
 cache features a changed version of the files used by yay to update the package.
 This can easily be fixed by removing the cache of the corresponding package.
+
+#### Python `ModuleNotFoundError: No module named...`
+
+This section is based on a
+[StackOverflow post by Helen](https://stackoverflow.com/questions/55923868/how-to-fix-modulenotfounderror-no-module-named-setuptools).
+
+In this case the error stems from a missing package.
+Normally it can easily be fixed by installing that corresponding package.
+But please note that `pyenv` can hide packages if the global Python version is set to something
+other than `system`.
+This is especially the case on [Arch Linux-systems](/wiki/linux/arch-linux.md) because Python
+packages are also installed via [Pacman or Yay](#arch-linux-pacman-and-yay).
+In this case the global Version has to be changed to `system` or the package installed to the
+non-system Python version.

wiki/linux/swayidle.md

@@ -0,0 +1,23 @@
+# swayidle
+
+swayidle is an idle manager for [Wayland](/wiki/linux/wayland.md).
+
+## Setup
+
+On most Linux distributions swayidle can be installed with the `swayidle` package.
+
+## Usage
+
+To run swayidle it has to be called - preferably after the boot process.
+An example of this will look like the following.
+This will [suspend-then-hibernate](/wiki/linux/systemd.md#change-suspend-and-hibernate-behaviour)
+the system after 30 seconds.
+Additionally a program [xss-lock](/wiki/linux/xss-lock.md) has to be used to let swayidle know to
+use a specific lock command.
+
+```sh
+#!/bin/sh
+
+exec swayidle -w \
+         timeout 30 'systemctl suspend-then-hibernate'
+```

wiki/linux/systemd.md

@@ -64,6 +64,39 @@ This can be achieved by running the following command.
 journalctl -b-1
 ```
 
+### Change Suspend and Hibernate Behaviour
+
+The behaviour of suspend and hibernation can be changed in the file `/etc/systemd/sleep.conf`.
+One of the most important variables is the one to set the hibernation delay time.
+This time will be used to determine the time that is taken from suspend to hibernation if
+suspend-to-hibernate is called.
+The following line will set this to 10 minutes.
+
+```txt 
+HibernateDelaySec=10min
+```
+
+### Handle Power Key and Lid Seitch
+
+The management of power keys and lid switches is handled in the file `/etc/systemd/logind.conf`.
+The following line will set the behaviour of the power key to hibernate. The default for this would
+be to shutdown the system.
+
+```txt
+HandlePowerKey=hibernate
+```
+
+The same can also be done to determine the action taken when the lid is closed.
+By default the closing of the lid will result in suspending the system.
+The following lines will change this to suspend-then-hibernate.
+
+```txt
+HandleLidSwitch=suspend-then-hibernate
+```
+
+For further behaviour of the suspend and hibernate actions check the
+[corresponding section](#change-suspend-and-hibernate-behaviour).
+
 ## Troubleshooting
 
 This section focusses on errors that correspond to the SystemD software.

wiki/linux/waydroid.md

@@ -0,0 +1,18 @@
+# Waydroid
+
+[Waydroid](https://waydo.id) is a container-based approach to boot a full
+[Android system](/wiki/android.md) on a regular [Linux system](/wiki/linux.md)
+
+## Setup
+
+On most [Linux distributions](/wiki/linux.md) Waydroid can be installed with the `waydroid`
+package.
+
+After setting up the system has to be initialized.
+When running `waydroid status` it will also tell, if initialization is needed.
+
+The initialization can easily be done by running the following command.
+
+```sh 
+waydroid init
+```

wiki/linux/wayland.md

@@ -0,0 +1,4 @@
+# Wayland 
+
+[Wayland](https://wayland.freedesktop.org/) is a replacement for the
+[X11 window system](/wiki/linux/x_window_system.md).

wiki/linux/xss-lock.md

@@ -0,0 +1,19 @@
+# xss-lock
+
+xss-lock is an external screen locker for [X11 Window Systems](/wiki/linux/x_window_system.md).
+Using xwayland it can also be used for [Wayland](/wiki/linux/wayland.md) systems.
+
+## Setup
+
+On most Linux distributions swayidle can be installed with the `xss-lock` package.
+
+## Usage
+
+To run xss-lock it has to be called - preferably after the boot process.
+An example of this will look like the following.
+This command makes the system use `swaylock` if the system is put to
+[sleep](/wiki/linux/systemd.md#change-suspend-and-hibernate-behaviour).
+
+```sh
+xss-lock -- swaylock
+```