How To Install qsf on Ubuntu 18.04
Introduction
In this tutorial we learn how to install qsf on Ubuntu 18.04.
What is qsf
qsf is:
Quick Spam Filter (QSF) is an Open Source email classification filter, designed to be small, fast, and accurate, which works to classify incoming email as either spam or non-spam.
QSF’s targets are speed, accuracy and simplicity:
- It is small and is written in C so it starts up quickly, unlike filters written in Perl.
- It understands MIME and HTML, so it can intelligently deal with modern spam, unlike older Bayesian filters such as ifile.
- It runs as an inline filter rather than as a daemon, so it is simple to install.
- It is written to do only one job - decide whether an email is spam or not using the content of the message alone - so it is less complex than filters such as SpamAssassin. Less complexity means bugs and security problems are less likely.
- As well as words and word pairs, QSF also spots special patterns in email such as runs of gibberish, HTML comments embedded in text, and other common spam giveaways, and its flexible tokeniser allows more patterns to be added as spammers change their tactics.
There are three methods to install qsf on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install qsf Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install qsf using apt-get by running the following command:
sudo apt-get -y install qsf
Install qsf Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install qsf using apt by running the following command:
sudo apt -y install qsf
Install qsf Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install qsf using aptitude by running the following command:
sudo aptitude -y install qsf
How To Uninstall qsf on Ubuntu 18.04
To uninstall only the qsf package we can use the following command:
sudo apt-get remove qsf
Uninstall qsf And Its Dependencies
To uninstall qsf and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove qsf
Remove qsf Configurations and Data
To remove qsf configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge qsf
Remove qsf configuration, data, and all of its dependencies
We can use the following command to remove qsf configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge qsf
References
Summary
In this tutorial we learn how to install qsf package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
