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# Arch Linux Packages
## Downgrade cached package
pacman -U /var/cache/pacman/pkg/package-version...
## Debloating
### 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
### Removing orphaned packages
pacman -Qtdq | pacman -Rns -
### List packages by size
LC_ALL=C pacman -Qi | awk '/^Name/{name=$3} /^Installed Size/{print $4$5, name}' | sort -h
## 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Might need to update mirrorlist first if outdated: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)
## Query (-Q)
By itself, outputs all installed packages.
## Browsing installed packages with `fzf`
pacman -Qq | fzf --preview 'pacman -Qil {}' --layout=reverse --bind 'enter:execute(pacman -Qil {} | less)'
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