arch linux pacman commands

pacman.commands

To update the system
sudo pacman -Syu

Update the database:
sudo pacman -Syy

Installing
To install a package (always run pacman -Syu, before installing):
sudo pacman -S package_name

To install a local package, or from a website:
sudo pacman -U /path/to/the/package

To re-install all packages (those from the repo’s), in case of emergency:
sudo pacman -Sy $(pacman -Q | cut -d " " -f1 | grep -v "$(pacman -Qm | cut -d " " -f1)")

Removing Packages
If you want to only remove the package, the following command is sufficient:
sudo pacman -R

To remove the package and those of its dependencies that aren’t needed by any other application, do
sudo pacman -Rs

Finally, to remove the package, avoid orphaned dependencies and erase its global configuration, type
sudo pacman -Rns package_name

Searches/Queries
Info about an installed package:
pacman -Qi package_name

Queries the repo about a package:
pacman -Ss package_name

Queries the repo about a packages, and all that depend on it:
pacman -Sii package_nam


which in most cases is the proper command to remove software.

often its best to run pacman -S archlinux-keyring before doing a system upgrade