linux: added 7z and moved arch-linux into linux folder

wiki/bittorrent.md

@@ -28,5 +28,5 @@ This is not a legal advice.
 Take your local laws into account when downloading torrents.
 Some torrents can be copyright infringing and therefor illegal to download.
 Only download legal and safe torrents like the
-[Arch Linux ISO](/wiki/linux/arch-linux/arch-linux.md#iso-medium).
+[Arch Linux ISO](/wiki/linux/arch-linux.md#iso-medium).
 Seeding it can help the community.

wiki/games/league_of_legends.md

@@ -21,7 +21,7 @@ used named `Lutris-GE` which can be found on
 It is important to set up the game correctly for anti-cheat to work properly.
 By checking the right box at the launch of the games the anti-cheat can be
 enabled to persist through reboots on most Linux distributions.
-For [Arch Linux](/wiki/linux/arch-linux/arch-linux.md) this has to be done
+For [Arch Linux](/wiki/linux/arch-linux.md) this has to be done
 manually as explained by
 [QuinnBorn on Reddit](https://www.reddit.com/r/leagueoflinux/comments/eokiir/anticheat_popup_every_reboot/).
 For that the file `/etc/sysctl.d/vsyscall.conf` has to be created with the

wiki/linux.md

@@ -9,6 +9,6 @@ Linux based operating systems are Unix-like.
 The different operating systems that are based on the Linux kernel are called
 distributions.
 
-- [Arch Linux](/wiki/linux/arch-linux/arch-linux.md) is a rolling-release
+- [Arch Linux](/wiki/linux/arch-linux.md) is a rolling-release
   distribution whose base system is as minimal and needs heavy user
   configuration.

wiki/linux/7-zip.md

@@ -0,0 +1,44 @@
+# 7-zip
+
+[7-zip](https://7-zip.org/) is a free and open-source file archiver.
+It places files or directories in an archive and is able to compress them.
+
+## Setup
+
+7-zip can be installed by installing the packages `p7zip-full` and `p7zip-rar` on Ubuntu systems.
+On [Arch Linux](/wiki/linux/arch-linux.md) it can be installed with the package `7-zip`
+from the [AUR](/wiki/linux/package_manager.md#arch-linux-pacman-and-yay).
+
+## Usage
+
+### Compressing and Uncompressing a Directory
+
+For directories to be compressed the Lempel–Ziv–Markov chain algorithm is recommended.
+It is fast with good compression results.
+
+As explained by
+[kenorb on superuser.com](https://superuser.com/questions/281573/what-are-the-best-options-to-use-when-compressing-files-using-7-zip)
+An effective way to compress a directory is the following command where `directory` is the directory
+that is to be compressed.
+The archive will be created by the same name as the directory but with the `.7z` extension.
+This command uses [expansion](/wiki/linux/shell.md#expansion).
+The directory is not deleted automatically afterwards.
+
+```sh
+7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on directory{.7z,}
+```
+
+To uncompress it run the following command.
+
+```sh
+7z x directory.7z
+```
+
+### Peek Contents of an Archive
+
+To list the content files of a 7-zip archive the following command can be used.
+The name of the archive is assumed to be `directory.7z`.
+
+```sh
+7z l directory.7z
+```

wiki/linux/arch-linux/installation.md

@@ -11,7 +11,7 @@ At the end of this guide a fully functional Arch Linux will be installed.
 ## 1. Preparation
 
 Ahead of the installation an Arch boot-stick has to be created as described in
-[the Arch Linux entry](/wiki/linux/arch-linux/arch-linux.md#installation-medium).
+[the Arch Linux entry](/wiki/linux/arch-linux.md#installation-medium).
 
 After that the USB can be plugged in the system on which Arch should be installed.
 Boot the target system and select `Boot Arch Linux (x86_64)`.
@@ -194,7 +194,7 @@ this will install a bunch of useful base software including
 [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)
+[Recommended practices](/wiki/linux/arch-linux.md#recommended-practices)
 should be checked for further setups.
 
 Additionally if you have a NVidia Graphics Cards you should read

wiki/linux/font_configuration.md

@@ -101,7 +101,7 @@ The repository is split into
 On some [package managers](/wiki/linux/package_manager.md) the fonts are further
 split depending on [typeface](/wiki/font.md#typefaces) and language.
 The following list shows the name of the
-[Arch Linux packages](/wiki/linux/arch-linux/arch-linux.md).
+[Arch Linux packages](/wiki/linux/arch-linux.md).
 The names on other distributions can vary slightly.
 
 - `adobe-source-han-sans-jp-fonts` is for japanese sans style fonts.

wiki/linux/ip.md

@@ -34,7 +34,7 @@ For VPN and other applications using a tunnel it can be useful to check the
 outside IP of your system.
 The following command uses the `dig` command.
 It is either bundled in the `dig` package - like in
-[Arch Linux](/wiki/linux/arch-linux/arch-linux.md) - or in the `dnsutils`
+[Arch Linux](/wiki/linux/arch-linux.md) - or in the `dnsutils`
 package - like in Ubuntu - or even another package depending on the distribution
 used.
 After installation the following command can be used to get the outside IP

wiki/linux/lvm.md

@@ -90,7 +90,7 @@ services other than the following commands.
 
 If the volume to shrink is the root volume it has to be done offline.
 For that a simple installation stick is enough.
-[The Arch Linux entry](/wiki/linux/arch-linux/arch-linux.md#installation-medium)
+[The Arch Linux entry](/wiki/linux/arch-linux.md#installation-medium)
 describes the creation of such a boot stick.
 Afterwards the operating system has to be booted from the just created stick or
 a comparable device.
@@ -164,4 +164,3 @@ Afterwards the file system can be matched to the logical volume so it takes up
 the full new size.
 This is explained in the
 [entry about disk management](/wiki/linux/disk-management.md#growing-a-file-system).
-

wiki/linux/microcode.md

@@ -12,4 +12,4 @@ manufacturer (on Arch Linux for example `intel-ucode` and `amd-ucode`).
 
 Automatic updates can be enabled depending on bootloader and operating system.
 For Arch Linux a description is given in the
-[Arch Linux entry](/wiki/linux/arch-linux/arch-linux.md#enable-microcode-updates).
+[Arch Linux entry](/wiki/linux/arch-linux.md#enable-microcode-updates).

wiki/linux/package_manager.md

@@ -4,7 +4,7 @@ Package managers are important programs to get software onto your system.
 
 ## Arch Linux: Pacman and Yay
 
-In [Arch Linux](/wiki/linux/arch-linux/arch-linux.md) there are 2 main types of
+In [Arch Linux](/wiki/linux/arch-linux.md) there are 2 main types of
 package managers.
 The first is pacman, the default package manager.