pacman.md

Remove a package and its dependencies which are not required by any other installed package

pacman -Rs <package>

Check if package is already installed

pacman -Qi <package>

Get a list of all installed packages

pacman -Qqe

Clean package cache

paccache -r

Path to pacman cache

/var/cache/pacman/pkg

Downgrade a package

pacman -U /var/cache/pacman/pkg/<package-old_version>.pkg.tar.xz

After this you sould blacklist the package temporarily inside: /etc/pacman.conf

IgnorePkg=<package>