To speedrun an Arch Linux installation, you can follow these steps:
1. Download the latest Arch Linux installation image from the official website and burn it to a USB drive or DVD.
2. Boot your computer from the installation media and select “Boot Arch Linux (x86_64)” from the menu.
3. Once the system has booted, connect to the internet using a wired or wireless connection.
4. Use the `timedatectl` command to set the correct time and date on your system.
5. Use the `fdisk` or `cfdisk` command to create a new partition on your hard drive. Be sure to create a boot partition and a root partition.
6. Use the `mkfs` command to format the partitions you created in the previous step.
7. Use the `mount` command to mount the root partition to the `/mnt` directory.
8. Use the `pacstrap` command to install the base system to the `/mnt` directory.
9. Use the `genfstab` command to generate a new `fstab` file, which tells the system where to mount the various partitions on boot.
10. Use the `arch-chroot` command to enter the new system and configure it.
11. Use the `passwd` command to set a password for the root user.
12. Use the `pacman` command to install any additional software you want to use on your system.
13. Use the `exit` command to exit the `chroot` environment and unmount the `/mnt` directory.
14. Reboot your system and remove the installation media. You should now be able to log in to your newly-installed Arch Linux system.
Keep in mind that these steps are just a general outline of how to speedrun an Arch Linux installation. Depending on your specific needs and preferences, you may need to make additional changes to the process. It’s always a good idea to carefully read through the official Arch Linux installation guide before beginning the installation process.