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# Arch Linux Packages
## Downgrade cached package
pacman -U /var/cache/pacman/pkg/package-version...
## Cleaning cache
paccache -r
* `-k`: how many past versions of each package to keep, defaults to 3.
* `-u`: target only uninstalled packages.
# remove all versions of uninstalled packages
paccache -ruk0
## Troubleshooting failed installations
Usually enough to update keyring:
pacman -Sy archlinux-keyring
Might need to update mirrorlist first if outdated:
sudo pacman -Sy pacman-mirrorlist
(this might put it in /etc/pacman.d/mirrorlist.pacnew, uncomment wanted mirrors
there and remove the .pacnew suffix)
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