اصلا بسته kde-full یا kde-desktop-full وجود نداشت بعد از یکمی سرچ kubuntu-desktop رو پیدا کردم اما این ارور بود :
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
kubuntu-desktop : Depends: dolphin but it is not going to be installed
Depends: kinfocenter but it is not going to be installed
Depends: kwin
Depends: okular but it is not going to be installed
Depends: plasma-desktop but it is not going to be installed
Depends: powerdevil but it is not going to be installed
Depends: sddm-theme-breeze but it is not going to be installed
Depends: software-properties-kde but it is not going to be installed
Recommends: amarok but it is not going to be installed
Recommends: apturl-kde but it is not going to be installed
Recommends: baloo-utils but it is not going to be installed
Recommends: cryptsetup but it is not installable
Recommends: k3b but it is not going to be installed
Recommends: kate but it is not going to be installed
Recommends: kde-telepathy but it is not going to be installed
Recommends: kdeconnect-plasma but it is not going to be installed
Recommends: krdc but it is not going to be installed
Recommends: ktorrent but it is not going to be installed
Recommends: kwin-addons but it is not going to be installed
Recommends: libreoffice-base but it is not installable
Recommends: libreoffice-kde but it is not going to be installed
Recommends: libreoffice-style-oxygen but it is not going to be installed
Recommends: plasma-discover but it is not going to be installed
Recommends: plasma-discover-updater but it is not going to be installed
Recommends: plasma-nm but it is not going to be installed
Recommends: plasma-widgets-addons but it is not going to be installed
Recommends: qtdeclarative5-xmllistmodel-plugin but it is not going to be installed
Recommends: skanlite but it is not going to be installed
E: Unable to correct problems, you have held broken packages.