The default package manager used in Arch Linux systems and their derivatives
When installing Arch Linux, you will need to install the base package group, including the pacman package. For the specific Arch Linux installation process, please refer to [Arch Wiki(CN)](https://wiki.archlinuxcn.org/wiki/%E5%AE% 89%E8%A3%85%E6%8C%87%E5%8D%97)
pacman -S p7zip
You can also install a package group
pacman -S gnome
pacman-Q
pacman -R p7zip
Or delete his dependencies at the same time
pacman -Rsc p7zip
pacman-Syyu