obs: virtual camera updated

wiki/linux/arch-linux/arch-linux.md

@@ -7,7 +7,14 @@ The Arch User Repositories (AUR) features community-made packages that can be
 installed with different
 [package manager that inlcude access to the AUR](/wiki/linux/arch-linux/package_manager.md).
 
-## Installation Medium
+## Installation
+
+The installation of a basic Arch Linux system is described in the
+[installation entry](/wiki/linux/arch-linux/installation.md).
+The entry features a guide to install a system with a X server setup aswell as
+programs for the most used tasks on a system.
+
+### ISO Medium
 
 For the installation usage of a simple USB key is advised.
 This has to be flashed with the Arch ISO.
@@ -17,11 +24,20 @@ The iso can be written on an USB-stick using the command
 `dd bs=4M if=<path to ISO> of=/dev/sdx conv=fsync oflag=direct status=progress`.
 `<path to ISO>` points the command to the location of the ISO file
 
+## Recommended Practices
+
+The following articles describe steps to undertake to harden the system security
+or setups and installation that are recommended for Arch Linux.
+
 ## Enable Microcode Updates
 
 The microcode of Intel and AMD CPUs can be automatically updated by installing
 the `amd-ucode` or `intel-ucode` package depending on your CPU.
-The following description assumes the system is installed with
+Not all processors are supported, especially old ones can lead to problems.
+It has to be confirmed that the processor is supported, if this is not the case
+is possible for the next steps to break the functionality of the bootloader.
+
+The following part assumes the system is installed with
 [UEFI bootloader](/wiki/linux/arch-linux/installation.md#10-install-and-configure-uefi-bootloader)
 similar to the [recommended guide](/wiki/linux/arch-linux/installation.md).
 The microcode updates can then be enabled by adding the following line into

wiki/linux/arch-linux/installation.md

@@ -209,6 +209,9 @@ this will install a bunch of useful base software including
 [a graphical environment](../x_window_system.md) and
 [a window manager](../suckless.md#programs).
 You can go on to other guides aswell.
+Especially the
+[Recommended practices](/wiki/linux/arch-linux/arch-linux.md#recommended-practices)
+should be checked for further setups.
 
 Additionally if you have a NVidia Graphics Cards you should read
 [the NVidia article](../nvidia.md) too.

wiki/linux/dm-crypt.md

@@ -2,7 +2,6 @@
 
 DM-Crypt can create and manage encrypted devices.
 
-
 ## Usage
 
 ### Creating an Encrypted Devices

wiki/linux/easyeffects.md

@@ -8,8 +8,8 @@ Easyeffects uses [Pipewire](./pipewire.md) as
 
 ## Setup
 
-Easyeffects can be installed in most distributions by installing the
-`easyeffects` plugin.
+Easyeffects can be installed on most distributions by installing the
+`easyeffects` package.
 An installation via [Flatpak](./flatpak.md) is also possible.
 
 ## Usage

wiki/linux/flac_(package).md

@@ -2,8 +2,10 @@
 
 This article describes the `flac` package on linux.
 For the audio codec see the [flac entry](../flac_(codec).md)
-
 `flac` is a package to work with the [flac codec](../flac_(codec).md).
+
+## Setup
+
 On most distributions it is bundled together with the command line tagging
 software `metaflac` and other auxiliary tools in the `flac` package.
 Another possible tagging software is [MusicBrainz Picard](../picard.md)

wiki/linux/fwupd.md

@@ -0,0 +1,39 @@
+# fwupd
+
+[fwupd](https://fwupd.org/) is a daemon for managing and installing firmware
+updates on Linux based operating systems.
+It is mainly used for UEFI firmware and supported devices.
+
+## Setup
+
+fwupd can be installed on most distributions by installing the
+`fwupd` package.
+
+## Usage
+
+The following commands describe the basic usage of an update process using
+fwupd.
+
+First the devices updatable by fwupd can be checked.
+
+```sh
+fwupdmgr get-devices
+```
+
+Afterwards the latest metadata can be downloaded by the following command.
+
+```sh
+fwupdmgr refresh
+```
+
+The updates can the be listed.
+
+```sh
+fwupdmgr get-updates
+```
+
+Finally the updates can be installed.
+
+```sh
+fwupdmgr update
+```

wiki/linux/intel.md

@@ -10,7 +10,7 @@ They provide motherboard chips, network interface controllers, flash memory,
 Intel graphics is the name for various intel made integrated graphics
 processors.
 
-### Usage
+### Configuration
 
 #### Screen Tearing
 

wiki/linux/microcode.md

@@ -3,7 +3,7 @@
 Processor vendors release stability and security updates to the processor
 microcode.
 
-## Installation
+## Setup
 
 Most Linux based operating systems feature packages depending on the processor
 manufacturer (on Arch Linux for example `intel-ucode` and `amd-ucode`).

wiki/linux/networkmanager.md

@@ -3,7 +3,7 @@
 NetworkManager - short NM - is a program to automatically detect and connect to
 networks by providing options for various configuration.
 
-## Installation
+## Setup
 
 NetworkManager can be installed with the `networkmanager` package on most linux
 distributions which provides daemon aswell as `nmcli` a command line interface

wiki/linux/nvidia.md

@@ -2,7 +2,7 @@
 
 NVidia is a vendor for graphics cards.
 
-## Setup NVidia GPU
+## Setup
 
 For NVidia GPUs to work install the `nvidia` and the `nvidia-utils` package.
 If you want to easily configure the monitors as described in a later section of

wiki/linux/sc-im.md

@@ -4,9 +4,6 @@
 
 ## Setup
 
-
-### Arch-Linux
-
 Sc-im can be installed via [github](https://github.com/andmarti1424/sc-im).
 Some distributions also feature the `sc-im` package.
 

wiki/linux/shell.md

@@ -3,7 +3,7 @@
 A shell is a command-line interpreter that provides a command-line interface to
 interact with the many unix-like system.
 
-## Change /bin/sh
+## Change the standard shell
 
 The Shell in some distributions is made up by a POSIX compliant mode of bash.
 Problem with that is the speed.
@@ -15,3 +15,27 @@ dash.
 - `sudo ln -sfT /bin/dash /bin/sh` - link /bin/sh to dash
 - `sudo vim /usr/share/libalpm/hooks/bash-update.hook` - setup a hook to avoid
 bash resetting the symlink
+
+## Disown a Command
+
+This section is based on a guide by
+[baeldung](https://www.baeldung.com/linux/detach-process-from-terminal).
+Disowning a command removes it from the current shell.
+Commands that are detached from a shell will not terminate upon its closure.
+A command can be disowned simply by appending `& disown` at the end of it.
+It will then provide the PID of the command that got disowned.
+
+## Silencing a Command
+
+This section is based on a guide by
+[baeldung](https://www.baeldung.com/linux/silencing-bash-output).
+If the output of a command is unwanted it can be silenced.
+There are two parts that can be silenced independently.
+Non-error outputs (stdout) can be silenced by appending `1> /dev/null` to the
+command.
+Due to the `1` being ommitable `> /dev/null` has the same effect.
+Error outputs (stderr) can be silenced by appending `2> /dev/null`.
+The complete output of both stderr and stdout can be silenced by appending
+`> /dev/null 2>&1` to the command.
+A shortened version of it not possible on all shells is `&> /dev/null`.
+

wiki/obs.md

@@ -2,6 +2,8 @@
 
 [Open Broadcaster Software](https://obsproject.com) - short OBS - is a free
 and open source software for video recording and live streaming.
+Additionally see the
+[the webcams entry](/wiki/linux/webcams.md#configure-the-webcam) if on Linux.
 
 ## Plugins
 
@@ -19,12 +21,10 @@ camera.
 First of all [V4L2](./linux/v4l2.md) needs to be set up.
 This guide assumes it is set up according to the section in the
 [V4L2 entry](./linux/v4l2.md#v4l2loopback).
-Make sure to start and/or enable it.
-Additionally `obs-v4l2sink` needs to be installed.
-Under `Tools/v4l2sink` select the device path set up in V4L2.
-Select the same video format as set for your camera.
-For Linux see [the webcams entry](/wiki/linux/webcams.md#configure-the-webcam)
-to configure the video format.
+Make sure to
+[start the service](/wiki/linux/systemd.md#startstopenabledisable-a-service) by
+running `systemctl start v4l2loopback.service` or enable it to start after each
+boot with `systemctl enable v4l2loopback.service`.
 Afterwards the virtual camera can be started.
 
 ### Background Removal