docs(book): update Linux installation instructions (#1272)

* docs(book): update linux installation instructions
* docs(book): replace apt with apt-get

---------

Co-authored-by: K4YT3X <github@k4yt3x.com>

Author: Integral-Tech

docs/book/src/installing/linux.md

@@ -1,19 +1,22 @@
 # Linux
 
-Instructions for installing this project on Linux systems.
+Video2X packages are available for the Linux distros listed below. If you'd like to build it from source code, refer to the [PKGBUILD](https://github.com/k4yt3x/video2x/tree/master/packaging/arch/PKGBUILD) file for a general overview of the required dependencies and commands. If a package is not available for your distro and you prefer not to compile the program from source code, consider using the [container image](running/container.md).
 
 ## Arch Linux
 
-Arch users can install the project from the AUR.
-
-```bash
-yay -S video2x-git
-```
+- AUR packages, maintained by [@K4YT3X](https://github.com/k4yt3x).
+  - [aur/video2x-git](https://aur.archlinux.org/packages/video2x-git)
+  - [aur/video2x-qt6](https://aur.archlinux.org/packages/video2x-qt6)
+  - [aur/video2x-qt6-git](https://aur.archlinux.org/packages/video2x-qt6-git)
+- Chinese Mainland: archlinuxcn packages, maintained by [@Integral-Tech](https://github.com/Integral-Tech).
+  - [archlinuxcn/video2x](https://github.com/archlinuxcn/repo/tree/master/archlinuxcn/video2x)
+  - [archlinuxcn/video2x-git](https://github.com/archlinuxcn/repo/tree/master/archlinuxcn/video2x-git)
+  - [archlinuxcn/video2x-qt6-git](https://github.com/archlinuxcn/repo/tree/master/archlinuxcn/video2x-qt6-git)
 
 ## Ubuntu
 
 Ubuntu users can download the `.deb` packages from the [releases page](https://github.com/k4yt3x/video2x/releases/latest). Install the package with the APT package manager:
 
 ```bash
-apt-get install ./video2x-linux-ubuntu2404-amd64.deb
+sudo apt-get install ./video2x-linux-ubuntu2404-amd64.deb
 ```