# pacman > Arch Linux package manager utility. - Synchronize and update all packages: `pacman -Syu` - Install a new package: `pacman -S {{package_name}}` - Remove a package and its dependencies: `pacman -Rs {{package_name}}` - Search the package database for a regular expression or keyword: `pacman -Ss "{{search_pattern}}"` - List installed packages and versions: `pacman -Q` - List only the explicitly installed packages and versions: `pacman -Qe` - Find which package owns a certain file: `pacman -Qo {{filename}}` - Empty package cache to free up space: `pacman -Scc`