How to uninstall bogofilter-qdbm from Ubuntu
To uninstall just bogofilter-qdbm package itself from Ubuntu execute on terminal:
sudo apt-get remove bogofilter-qdbm
Uninstall bogofilter-qdbm and it's dependent packages
To uninstall the bogofilter-qdbm package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove bogofilter-qdbm
If you also want to delete configuration and/or data files of bogofilter-qdbm from Ubuntu then this will work:
sudo apt-get purge bogofilter-qdbm
To delete configuration and/or data files of bogofilter-qdbm and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge bogofilter-qdbm
bogofilter-qdbm package information
a fast Bayesian spam filter (QDBM)
This package implements a fast Bayesian spam filter along the lines suggested by Paul Graham in his article "A Plan For Spam". This version substantially improves on Paul's proposal by doing smarter lexical analysis. In particular, hostnames and IP addresses are retained as recognition features rather than broken up. Various kinds of MTA cruft such as dates and message-IDs are discarded so as not to bloat the word lists.
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.