How to uninstall qca-dev from Ubuntu
To uninstall just qca-dev package itself from Ubuntu execute on terminal:
sudo apt-get remove qca-dev
Uninstall qca-dev and it's dependent packages
To uninstall the qca-dev package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove qca-dev
If you also want to delete configuration and/or data files of qca-dev from Ubuntu then this will work:
sudo apt-get purge qca-dev
To delete configuration and/or data files of qca-dev and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge qca-dev
qca-dev package information
Qt Cryptographic Architecture - development files
Taking a hint from the similarly-named Java Cryptography Architecture, QCA aims to provide a straightforward and cross-platform crypto API, using Qt datatypes and conventions. QCA separates the API from the implementation, using plugins known as Providers. The advantage of this model is to allow applications to avoid linking to or explicitly depending on any particular cryptographic library. This allows one to easily change or upgrade crypto implementations without even needing to recompile the application! This package contains the files necessary to compile applications using qca. Qca version 1 is deprecated - use qca2 if possible.
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.