How to uninstall cupsys-client from Ubuntu
To uninstall just cupsys-client package itself from Ubuntu execute on terminal:
sudo apt-get remove cupsys-client
Uninstall cupsys-client and it's dependent packages
To uninstall the cupsys-client package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove cupsys-client
If you also want to delete configuration and/or data files of cupsys-client from Ubuntu then this will work:
sudo apt-get purge cupsys-client
To delete configuration and/or data files of cupsys-client and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge cupsys-client
cupsys-client package information
Common UNIX Printing System (transitional package)
This is a dummy package to ease transition to new package name. You can safely remove it after the upgrade.
More information about apt-get remove
Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.
apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.