How To Install fityk on Ubuntu 21.04

In this guide, we’ll discuss How To Install fityk on Ubuntu 21.04. Also, we will demonstrate how to uninstall and update fityk.

One-liner install command

For those in a hurry, here's a one-line installation command:

sudo apt-get update && sudo apt -y install fityk

But if you are interested in the detailed steps with descriptions, the following information is for you.

What is fityk and what are the ways to install it?

Before beginning this tutorial, you will need access to a server or computer running Ubuntu 21.04. This guide was written specifically with a server running Ubuntu 21.04 in mind, although it should also work on older, supported versions of the operating system.

Also, make sure you are running a regular, non-root user with sudo privileges configured on your server. When you have an account available, log in as your non-root user to begin.

There are several ways to install fityk on Ubuntu 21.04. You can use (links are clickable):

In the following sections, we will describe each method in detail. You can choose one of them or refer to the recommended one.

Install fityk using apt-get

First, update apt database with apt-get using the following command.

sudo apt-get update

After updating apt-get database, You can install fityk using apt by running the following command:

sudo apt -y install fityk

Install fityk using apt

Because fityk is available in Ubuntu 21.04’s default repositories, it is possible to install it from these repositories using the apt packaging system.

To begin, update apt database with apt using the following command.

sudo apt update

After updating apt database, You can install fityk using apt by running the following command:

sudo apt -y install fityk

Install fityk 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 21.04. Update apt database with aptitude using the following command.

sudo aptitude update

After updating aptitude database, You can install fityk by running the following command:

sudo aptitude -y install fityk

How to upgrade (update) a single package fityk using apt-get?

First, you will need to update packages index. Run update command as usual:

sudo apt-get update

Next, to upgrade only the fityk, e.g. single package, you should use the following format with the apt-get command/apt command:

sudo apt-get --only-upgrade install fityk

Note that this command will not install any new packages! If you wish to install the package if it doesn't exist you may leave out --only-upgrade part.

How To Uninstall fityk from Ubuntu 21.04

To uninstall only the fityk package you can execute the following command:

sudo apt-get remove fityk

Uninstall fityk and all its dependencies

To uninstall fityk and its dependencies that are no longer needed by Ubuntu 21.04, you can use the command below:

sudo apt-get -y autoremove fityk

Remove fityk with all configurations and data

To remove fityk configuration and data from your system you can run the following purge command:

sudo apt-get -y purge fityk

Remove fityk completely (configurations, data and all of its dependencies)

And lastly, you can run the next command to remove absolutely everything related to fityk package, e.g.: configurations, data and all of its dependencies. Just use this command:

sudo apt-get -y autoremove --purge fityk

Extra info and code examples

Fityk is a flexible and portable program for nonlinear fitting of analytical functions (especially peak-shaped) to data (usually experimental data). In other words, for nonlinear peak separation and analysis. It was developed for analyzing diffraction patterns, but can be also used in other fields, since concepts and operations specific for crystallography are separated from the rest of the program. Fityk offers various nonlinear fitting methods, subtracting background, calibrating data, easy placement of peaks and changing peak parameters, automation of common tasks with scripts, and much more. The main advantage of the program is flexibility - parameters of peaks can be arbitrarily bound to each other, eg. the width of a peak can be an independent variable, can be the same as the width of another peak or can be given by a complicated - common to all peaks - formula. libjs-sphinxdoc is necessary for the Javascript stuff in the documentation.


You now have a full guide on how to install fityk using apt, apt-get and aptitude tools. Also, we showed how to update as a single package and different ways to uninstall the fityk from Ubuntu 21.04.

See also:

How To Install fityk on Ubuntu 22.04

How To Install fityk on Ubuntu 21.04

How To Install fityk on Debian 11

How To Install fityk on CentOS 8

How To Install fityk on Fedora 34

How To Install fityk on Kali Linux