![](https://lemmy.ml/pictrs/image/GiHIfxIEUs.jpg)
To use pacman you must have root permissions. You can do this by using sudo
.
If your installation is correct, you must just use sudo pacman -S kdeplasma-addons
sudo
is a command that escalates your user's privileges to have root
power
pacman -S
installs a package
And did u find out?