linux: cannot open shared library error

wiki/firefox.md

@@ -2,8 +2,10 @@
 
 [Firefox](https://www.mozilla.org/en-US/Firefox) is a free and open-source web
 browser.
-There are browsers that are based on Firefox and expand on its features like Zen browser.
-For this the usage is mostly the same.
+There are browsers that are based on Firefox and expand on its features like
+[Zen browser](/wiki/zen_browser.md).
+For this the usage is mostly the same except for the parts noted in the
+[Zen Browser entry](/wiki/zen_browser.md).
 
 ## Usage
 
@@ -109,7 +111,7 @@ The following add-ons provide translation options.
 The following add-ons add information to online shops.
 
 - [Fakespot](https://www.fakespot.com/) is an add-on made by Mozilla which displays additional
-  information on online shops, ebay and amazon. 
+  information on online shops, ebay and amazon.
   It can give shops, vendors and products a trust score which can be used as an alternative to
   reviews, which might be fake.
 

wiki/globalprotect.md

@@ -0,0 +1,21 @@
+# GlobalProtect 
+
+[GlobalProtect](https://www.paloaltonetworks.de/resources/datasheets/globalprotect-datasheet) is a
+cross-platform [VPN](/wiki/vpn.md).
+
+## Installation
+
+The GlobalProtect client is available for [Windows](/wiki/windows.md), MacOS,
+[Linux](/wiki/linux.md), [Android](/wiki/android.md) aswell as iOs and iPadOS.
+On some Linux distributions the package is called `globalprotect-openconnect` but the corresponding
+command is called `gpclient` which can sometimes lead to confusion.
+
+## Usage 
+
+The usage of the GlobalProtect client is pretty simple.
+After starting the program the portal address has to be added and is followed by a login.
+Afterwards the client will connect.
+
+GlobalProtect is usually used by bigger companies and universities like the
+[University of Oldenburg](https://uol.de/it-services/services/campus-network) which wrote a proper
+installation and usage guide for all the operating systems that are supported.

wiki/linux/hardware.md

@@ -30,3 +30,10 @@ Tools, programs and guides to manage the power usage and improve battery life ar
 
 The viewing of temperatures of coolers aswell as the selection of RGB-settings can be achieved by
 using [liquidctl](https://github.com/liquidctl/liquidctl).
+
+## Temperature 
+
+To check the temperature the command `sensors` can be used which (on most distributions) is a part
+of the `lm_sensors` package.
+It will then display all the available temperature sensors available aswell as many other sensors
+like the RPM for fans.

wiki/linux/kernel.md

@@ -1,41 +0,0 @@
-# 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
-```
-
-If you want to switch the backup to Zen too, the backup file in `boot/loader/entries/` has to be
-changed too.
-Afterwards the system should be rebooted for the change to take effect.

wiki/linux/mkinitcpio.md

@@ -1,8 +1,68 @@
 # mkinitcpio
 
 `mkinitcpio` is a script to create an initial ramdisk environment.
+This environment provides the [Linux](/wiki/linux.md) kernel, containing essential drivers and
+utilities required at boot.
 
-## Usage
+## Kernel Versions
+
+There are a few possible kernel version that can be used by `mkinitcpio`.
+
+### 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
+```
+
+If you want to switch the backup to Zen too, the backup file in `boot/loader/entries/` has to be
+changed too.
+Afterwards the system should be rebooted for the change to take effect.
+
+## Usage 
+
+The following addresses various usage and configuration choices for mkinitcpio.
+
+### Default and Fallback Images
+
+It is recommended to have at least one default and one fallback version for kernels.
+After the initial generation of the kernel the configuration file can be found in the
+`/etc/mkinitcpio.d` directory.
+For the [`linux`-kernel](#stable-version-linux) it would contain `linux.preset` and for the
+[`linux-zen`-kernel](#zen-version-linux-zen) `linux-zen.preset`.
+Inside these preset files the following line manages the generation of a default or fallback image.
+
+```txt
+PRESETS=('default'  'fallback')
+```
+
+Notice that the options are separated only by a space.
+To just build a fallback image remove `'default'` or vice versa.
+
+Afterwards the initial ramdisk has to be [rebuild](#manually-generate-initial-ramdisk).
 
 ### Manually Generate Initial Ramdisk
 
@@ -20,6 +80,22 @@ But it is also possible to (re-)generate all available presets with the followin
 mkinitcpio -P
 ```
 
+### Enable/Disable Compression
+
+To save space on the boot partition the kernel images can be compressed.
+To enable compression activate it in `/etc/mkinitcpio.conf` under `COMPRESSION=`.
+In the configuration file some compression algorithms are recommended.
+Additionally compression options can be set under `COMPRESSION_OPTIONS=`.
+An easily usable example for this is the following line.
+
+```txt 
+COMPRESSION_OPTIONS=(-v -5 --long)
+```
+
+To disable compression remove the corresponding lines.
+After enabling and disabling of the compression the initial ramdisk has to be
+[rebuild](#manually-generate-initial-ramdisk).
+
 ## Troubleshooting
 
 This section addresses various errors that can happen when using mkinitcpio.
@@ -47,3 +123,9 @@ A simple table that shows firmware modules and corresponding
 [Arch Linux](/wiki/linux/arch-linux.md) packages is shown on the
 [Arch Linux wiki](https://wiki.archlinux.org/title/Mkinitcpio#Possibly_missing_firmware_for_module_XXXX).
 
+### `No space left on device`
+
+If this error or one similar to this is shown the boot partition is filled up completely during the
+generation of the initial ramdisk.
+This can be fixed by either [compressing the image](#enabledisable-compression) or by 
+[disabling unused fallbacks](#default-and-fallback-images).

wiki/linux/package_manager.md

@@ -19,22 +19,36 @@ It features the same syntax.
 
 This section addresses various usages of the arch linux package managers.
 
-#### Downgrading Packages 
+#### Ignoring Packages
+
+Packages can be ignored by adding the package in `/etc/pacman.conf` under `IgnorePkg`.
+In the following example `waybar` is ignored from updates.
+To add more packages just add them separated by spaces.
+
+```txt
+IgnorePkg = waybar
+```
+
+To unignore the package from updates remove it from this line.
+
+#### Downgrading Packages
 
 Packages of the AUR can be downgraded by using the
 [Downgrade](https://github.com/archlinux-downgrade/downgrade) program.
 This program can then easily be used to an AUR package.
 This works like the following assuming the package `v4l2loopback-dmks` needs to be downgraded.
 
-```sh 
+```sh
 sudo downgrade v4l2loopback-dmks
 ```
 
 Afterwards the target version can be selected and the downgrading process will conclude.
+After the downgrade of a package you will get asked if you want to
+[ignore future updates](#ignoring-packages).
 
 #### Manual Installation of a `PKGBUILD` File
 
-A `PKGBUILD` file is a [shell](/wiki/linux/shell.md) script that contains the installation 
+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.
 
@@ -80,7 +94,7 @@ paccache -rvuk0
 
 Since `yay` mirrors the usage of `pacman` it can be used the same way and will clean both caches.
 
-```sh 
+```sh
 yay -Sc
 ```
 
@@ -290,3 +304,18 @@ This is especially the case on [Arch Linux-systems](/wiki/linux/arch-linux.md) b
 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.
+
+#### Error `exists in filesystem`
+
+This section is based on a
+[reddit post by 194668PT](https://www.reddit.com/r/archlinux/comments/17jempk/pacman_exists_in_filesystem_errors/).
+
+If an error shows up that describes that a file of a package `exists in filesystem` usually a
+permission/owner error happened.
+This can happen when running `pacman -Syyu`.
+To update the package either way the following command can be used.
+`<package name>` should be exchanged for the package that throws the error.
+
+```sh
+sudo pacman -S --overwrite "*" <package name>
+```

wiki/linux/shell.md

@@ -222,3 +222,12 @@ It is related to a terminal line setting problem.
 ```sh
 stty sane
 ```
+
+### Error `cannot open shared object file: No such file or directory`
+
+This section is based on a
+[Github issue by stephenson](https://github.com/rubygems/rubygems/issues/7523).
+This error can occur for many different programs and with many different commands which is why it
+is listed in the shell entry.
+To fix it the most common and most effective way is to [reinstall](/wiki/linux/package_manager.md)
+the program that throws the error.

wiki/teamspeak.md

@@ -25,11 +25,7 @@ The server software can be setup via [Docker](/wiki/docker.md) with the
 [teamspeak image](./docker/teamspeak.md).
 This image can setup a Teamspeak3 server.
 
-## Usage
-
-This section addresses various features of Teamspeak3.
-
-### Link Teamspeak3 to a subdomain
+#### Link Teamspeak3 to a subdomain
 
 To link Teamspeak3 to one of your subdomains you need to add a
 [DNS SRV-record](./dns.md#srv-record):
@@ -47,6 +43,10 @@ port: 9987 (or your teamspeak3 port)
 target: ts3.<domain>.<TLD>
 ```
 
+## Usage
+
+This section addresses various features of Teamspeak3.
+
 ### Installing a Sound Pack
 
 Sound packs can be found on the
@@ -68,3 +68,13 @@ The following is a list of bots featured in this wiki that can do this.
 - [Sinusbot](/wiki/sinusbot.md) is a self-hosted bot for Teamspeak that can play music and sounds. 
   It's closed-source and free of charge.
   It also features [Discord](/wiki/discord.md) support.
+
+### Channel Visibility
+
+As explained by
+[guisinho_DBR on the Teamspeak forums](https://community.teamspeak.com/t/room-that-nobody-can-see-only-some-people-with-powers/20471)
+there is no way to hide a channel completely from view.
+It is however possible to set the subscription and description view power of a channel to a high
+value.
+This will permit only users with higher powers to see who is connected to the channel and view the
+description of a channel.

wiki/vpn.md

@@ -15,4 +15,5 @@ This section lists various VPN implementations.
 - [OpenVPN](/wiki/openvpn.md) is probably the most well known VPN implementation.
 - [WireGuard](/wiki/wireguard.md) is a modern, fast and secure implementation of the VPN protocol.
   It is free and open-source.
-- Global Protect is a proprietary VPN that is mostly used by corporation and learning facilities.
+- [Global Protect](/wiki/global_protect.md) is a proprietary VPN that is mostly used by corporation
+  and learning facilities.

wiki/zen_browser.md

@@ -0,0 +1,19 @@
+# Zen Browser
+
+[Zen Browser](https://zen-browser.app) is a free and open-source web browser that was split off of
+[Firefox](/wiki/firefox.md) in 2024.
+The settings and usage of this browser is largely the same as Firefox'.
+This article only addresses things that differ from the normal usage - please refer to the
+[Firefox entry](/wiki/firefox.md) for everything else.
+
+## Usage
+
+The following section addresses different uses and add-ons of Zen Browser.
+
+### Enabling Dark/Light Mode 
+
+As explained in a
+[reddit post by Nureddinn](https://www.reddit.com/r/zen_browser/comments/1m4jn3y/zen_browser_stuck_at_light_mode/)
+the theme of Zen Browser can be changed by right-clicking the sidebar and selecting `Edit Theme`.
+In the pop-up configuration window the dark theme can be enabled by clicking the moon, the light
+theme by clicking the sun and the system default option by clicking the star.