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# All the following command work as well with multiple package names
# To search for a package
pacman -Ss <package name>
# To update the local package base and upgrade all out of date packages
# To install a package
pacman -S <package name>
# To uninstall a package
pacman -R <package name>
# To uninstall a package and his depedencies, removing all new orphans
pacman -Rcs <package name>
# To get informations about a package
pacman -Si <package name>
# To install a package from builded package file (.tar.xz)
pacman -U <file name/file url>
# To list the commands provided by an installed package
pacman -Ql <package name> | sed -n -e 's/.*\/bin\///p' | tail -n +2
# To list explicitly installed packages
# To list the top-most recent explicitly installed packages (not in the base groups)
expac --timefmt='%Y-%m-%d %T' '%l\t%n' $(comm -23 <(pacman -Qeq|sort) <(pacman -Qqg base base-devel|sort)) | sort -r | head -20
# To list orphan packages (installed as dependencies and not required anymore)
# overwrite package
# You can't directly install packages from the Arch User Database (AUR) with pacman.
# You need yaourt to perform that. But considering yaourt itself is in the AUR, here is how to build a package from its tarball.
# Installing a package from AUR is a relatively simple process:
# - Retrieve the archive corresponding to your package from AUR website
# - Extract the archive (preferably in a folder for this purpose)
# - Run makepkg in the extracted directory. (makepkg-s allows you to install any dependencies automatically from deposits.)
# - Install the package created using pacman
# Assuming $pkgname contains the package name.
tar zxvf "$pkgname.tar.gz"
# Build the package
sudo pacman -U <package file (.pkg.tar.xz)>
# Reinstall a package installed via pip with pacman
sudo pip uninstall --yes <package>; sudo pacman -S --noconfirm python-<package>
# If there is some package from AUR use you package manager.
# Exemple with pikaur
pikaur -S --noconfirm --rebuild $(pikaur -Qq | grep "python-")
# note pikaur -Qe seems to return only official package and not them from AUR