- change your working directory to the place where you want to download the package at.
- download a tarball and extract it. Both is done with the command
curl -L -O https://aur.archlinux.org/cgit/aur.git/snapshot/arc-dark-suite.tar.gz
- use
ls to get a list of all files in the directory
- change the directory to the extracted folder
cd arc-dark-suite
- now run
makepkg -si . The command -si automatically resolves and install any dependencies with pacman before building and installs the package if it is built successfully.
Now do you use SDDM (The Simple Desktop Display Manager)? If yes fine, if not you should. It is the preferred display manager for KDE Plasma desktops.
Open the config file with sudo nano /etc/sddm.conf to be able to change things in there. Scroll to the Theme section and set arc-dark-suite as default (instead of breeze).