How to Install Nomacs on Fedora 36 Linux

Nomacs is an open-source, free image viewer that supports multiple platforms. You can use it for viewing all standard formats, including RAW and PSD files, by tapping on the widget with additional information such as thumbnails or histograms revealed beneath its semi-transparent surface – no need to open up another app!

The imaging software also contains many features, such as it can be used to adjust the brightness, contrast, and hue of an image while maintaining saturation. It also has a pseudo color function that allows you to create false colors studies in one go with ease! Another unique feature about nomac’s software is its ability for multiple instances where it will sync up any changes made from different zoom levels or panning motions, so they match perfectly on screen at all times – making review sessions much more informative than before as well because viewers can see exactly how things changed when zooming around inside each photo frame.

In the following tutorial, you will learn how to install Nomacs Image Viewer on Fedora 36 Linux using the Fedora default repository or alternative flatpak installation manager for those that may want to use a much-updated version.

Update Fedora

The first step is to make sure your system is up-to-date to avoid issues during the installation and for good practice. This is done by opening your terminal and using the following command.

sudo dnf upgrade --refresh

Install Nomacs Image Viewer – DNF Method

For most users, the easiest way to install the software is to utilize the Fedora repository using the DNF package manager; given that Fedora focuses on the latest releases every six months and often, during that time, releases even more updates, you are generally on the latest if not one version behind in most cases making it desirable instead of using alternative package managers.

Install Nomacs Image Viewer using the following DNF install command.

sudo dnf install nomacs -y

Install Nomacs Image Viewer – Flatpak Method

The second option is to use the Flatpak package manager installed on Fedora-based systems. The extra benefit of using Flatpak installations is that you will always have the most up-to-date version. However, with distributions such as Fedora or similar types that focus on the latest packages, the significant advantage is often not as substantial or not present. However, still, this is the user’s discretion in choosing.

First, re-install the Flatpak manager if it was removed previously.

sudo dnf install flatpak -y

For users re-installing Flatpak, it is often recommended to reboot your system. Failure to do this can occur with odd issues arising, such as paths not being generated for icons.



Next, you need to enable Flatpack using the following command in your terminal.

sudo flatpak remote-add --if-not-exists flathub

Ideally, you should reboot at this stage; if you skip this and notice icons not appearing, the reboot will generate the paths required for the future.


Now install using the following flatpak command.

flatpak install flathub org.nomacs.ImageLounge -y

If the above command does not work and you receive the “error: Unable to load summary from remote flathub: Can’t fetch summary from disabled remote ‘flathub’ use the following command.

flatpak remote-modify --enable flathub

This will fix the issue.

How to Launch Nomacs Image Viewer

Now that you installed the image viewer, launching can be done in two ways.

Use the following command to launch the image viewer software straight away in your terminal type.


If you want to launch and use the terminal, send it to the background with the following command.

nomacs &

Alternatively, Flatpak users will need to launch using the command below from a terminal instance.

flatpak run org.nomacs.ImageLounge

However, this isn’t practical, and you would use the following path on your desktop.

 Activities > Show Applications > nomacs


How to Install Nomacs on Fedora 36 Linux

Once open, you will need to select your default language the first time when you open the software, and then you can proceed to use the image viewer.


How to Install Nomacs on Fedora 36 Linux

How to Update Nomacs Image Viewer

Using the command terminal, you can use one of the update commands featured below to match your package manager installation to check manually for upgrades. This can come in handy if automatic upgrades malfunction, which is rare but occurs if incorrectly set up.

I would recommend that newer users use the following command to check for updates to get a feel for the terminal more often. Advanced users will use whatever they see fit, but this is a recommendation only, given that the tutorials focus on new users.

DNF Update Method

sudo dnf update --refresh

Flatpak Update Method

flatpak update

How to Remove (Uninstall) Nomacs Image Viewer

Use one of the following commands to suit the original installation method for users who no longer require the application.

DNF Remove Method

sudo dnf autoremove nomacs -y

Flatpak Remove Method

flatpak uninstall --delete-data org.nomacs.ImageLounge -y

Next, run the following command for any leftover clean-up.

flatpak remove --unused

Comments and Conclusion

In the tutorial, you have learned how to install Nomacs on Fedora 36 Linux.

If you are looking for a powerful yet lightweight image viewer that supports multiple platforms, Nomacs is your program. It is free and open-source, so it won’t cost you anything to download and use it. Its features include thumbnail browsing, comparison viewing, tagging/rating images, slideshows, etc.


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