Hi k13pt0,
1. These are service accounts that are automatically created during installation. You can hide them from the login screen by just adding "couchdb,systemd-coredump" to "HideUsers=" in "/etc/sddm.conf". This is what mine looks like:
Code:
HideUsers=arpwatch,speech-dispatcher,postgres,couchdb,systemd-coredump
Was that what you were after?
2. Dolphin cannot be run as root as a result of a design decision by the developers:
https://cgit.kde.org/dolphin.git/com...7901e9b417cf89
Some distros ship with old versions or implemented other workarounds.
The KDE developers are working on a polkit route to allow temporary elevated privileges but my guess is that it will still have to be launched as unprivileged user.
In the meantime you can use Konquerer as root. Works like a charm.
Hope that helps,
Re4son