How to uninstall cpad-common from Ubuntu
To uninstall just cpad-common package itself from Ubuntu execute on terminal:
sudo apt-get remove cpad-common
Uninstall cpad-common and it's dependent packages
To uninstall the cpad-common package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove cpad-common
If you also want to delete configuration and/or data files of cpad-common from Ubuntu then this will work:
sudo apt-get purge cpad-common
To delete configuration and/or data files of cpad-common and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge cpad-common
cpad-common package information
common files to support the Synaptics cPad driver kernel modules
This package provides common files required by the cpad-kernel-module packages that are generated from the cpad-kernel-source package. You do not need it to install and compile from the cpad-kernel-source package, but you will need it to install and use the -module packages that it creates.
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.