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CachyOS

Adding CachyOS Repository for Enhanced Arch Linux Performance

Installing CachyOS repositories

Option 1: Automated Installation of cachyos repositories

We’ve made it easy for you! Simply run the following commands to use our helper script that does all the work for you. 😉

Run the following commands:

  1. Get archive with the script
Terminal window
curl https://mirror.cachyos.org/cachyos-repo.tar.xz -o cachyos-repo.tar.xz
  1. Extract and enter into the archive
Terminal window
tar xvf cachyos-repo.tar.xz && cd cachyos-repo
  1. Run the script with sudo
Terminal window
sudo ./cachyos-repo.sh

Behavior of the script

  1. The script will auto-detect the CPU architecture, if the CPU has x86-64-v4 or x86-64-v3 support, the script will automatically use the repositories which are optimized with this flag > and some other flags.
  2. The script will backup your old pacman.conf.

For more information, check out our GitHub or join our Discord community.

Option 2: Manual Installation

  1. Install the cachyos keyring
Terminal window
sudo pacman-key --recv-keys F3B607488DB35A47 --keyserver keyserver.ubuntu.com
sudo pacman-key --lsign-key F3B607488DB35A47
  1. Install required packages
Terminal window
sudo pacman -U 'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-keyring-20240331-1-any.pkg.tar.zst' \
               'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-mirrorlist-18-1-any.pkg.tar.zst'    \
               'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-v3-mirrorlist-18-1-any.pkg.tar.zst' \
               'https://mirror.cachyos.org/repo/x86_64/cachyos/cachyos-v4-mirrorlist-6-1-any.pkg.tar.zst'  \
               'https://mirror.cachyos.org/repo/x86_64/cachyos/pacman-6.1.0-5-x86_64.pkg.tar.zst'

Check CPU compatibility

If you want to add our repositories manually, you must check the compatibility of your CPU with CachyOS repositories.

If you are using the script above to add the CachyOS repositories, you can skip the check.

1. Check support by running the following the command

Terminal window
/lib/ld-linux-x86-64.so.2 --help | grep supported

2. Understanding the command output

Pay attention to the following text with brackets. (supported, searched)

  • If you see x86-64-v4 (supported, searched), that means the CPU is compatible and can use the x86-64-v4 instruction set.
  • If you see x86-64-v4, that means the CPU is incompatible and cannot use the x86-64-v4 instruction set.

Example of CPU compatible with the x86-64-v4 instruction set

> /lib/ld-linux-x86-64.so.2 --help | grep supported
  x86-64-v4 (supported, searched)
  x86-64-v3 (supported, searched)
  x86-64-v2 (supported, searched)

Example of CPU incompatible with the x86-64-v4 instruction set

> /lib/ld-linux-x86-64.so.2 --help | grep supported
  x86-64-v3 (supported, searched)
  x86-64-v2 (supported, searched)

3. Adding the CachyOS repositories

You need to edit pacman.conf and add the repositories ABOVE THE EXISTING ARCHLINUX REPOS

Terminal window
sudo nano /etc/pacman.conf

If your CPU supports only x86-64, then only add the [cachyos] repository

# cachyos repos
[cachyos]
Include = /etc/pacman.d/cachyos-mirrorlist

If your CPU supports x86-64-v4, then add [cachyos-v4], [cachyos-core-v4], [cachyos-extra-v4] and [cachyos]

# cachyos repos
## Only add if your CPU supports the x86-64-v4 architecture
[cachyos-v4]
Include = /etc/pacman.d/cachyos-v4-mirrorlist
[cachyos-core-v4]
Include = /etc/pacman.d/cachyos-v4-mirrorlist
[cachyos-extra-v4]
Include = /etc/pacman.d/cachyos-v4-mirrorlist
[cachyos]
Include = /etc/pacman.d/cachyos-mirrorlist

If your CPU supports x86-64-v3, then add [cachyos-v3],[cachyos-core-v3],[cachyos-extra-v3] and [cachyos]

# cachyos repos
## Only add if your CPU supports the x86-64-v3 architecture
[cachyos-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos-core-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos-extra-v3]
Include = /etc/pacman.d/cachyos-v3-mirrorlist
[cachyos]
Include = /etc/pacman.d/cachyos-mirrorlist

Finally, update your system with the CachyOS packages:

Terminal window
sudo pacman -Syu

Enjoy your improved system speed with optimized CachyOS packages! 🎉

Debug packages

We provide a debuginfod server for easy access to debug symbols via gdb. Set the following environment variable:

Terminal window
export DEBUGINFOD_URLS=https://debuginfod.cachyos.org

Debug packages are available in the cachyos-debug-v3 repository. Add it with the following configuration:

[cachyos-debug-v3]
Server = https://debug.cachyos.org/repo/$arch_v3/$repo
[cachyos-core-debug-v3]
Server = https://debug.cachyos.org/repo/$arch_v3/$repo
[cachyos-extra-debug-v3]
Server = https://debug.cachyos.org/repo/$arch_v3/$repo

Uninstalling CachyOS repositories

ATTENTION: Since pacman 6.1 Arch has introduced a validation layer for features. Since we provide a fork of pacman, which adds various features, there will be an influx of warnings, when downgrading to the archlinux pacman, due the missing “Installed from” Feature. We have tried to push this feature to pacman, since various people and maintainer were interested in, but got declined by the pacman maintainer.

This can be resolved with installing the archlinux pacman first before reinstalling all packages.

Terminal window
sudo pacman -S core/pacman

Option 1: Automated Removal

Run these commands to remove the CachyOS repos from your system:

Terminal window
wget https://build.cachyos.org/cachyos-repo.tar.xz
tar xvf cachyos-repo.tar.xz
cd cachyos-repo
sudo ./cachyos-repo.sh --remove

Option 2: Manual Removal

  1. Backup or remove the config file at /etc/pacman.conf.
  2. Run this command:
Terminal window
sudo mv /etc/pacman.conf.bak /etc/pacman.conf
  1. Switch to default Arch Linux packages with this command:
Terminal window
sudo pacman -S core/pacman
pacman -Qqn | sudo pacman -S -
sudo pacman -Syu