Where is fslint (duplicate file finder) for Ubuntu 20.04?

I tried to install fslint

:~# apt install fslint

and I received

Package fslint is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'fslint' has no installation candidate

Well, fslint was avaliable in Ubuntu 19.10.

In the fslint website shows it is available for Ubuntu.

What happened?
Was it removed from the 20.04 repository?
Or they substituted for another package or name?

4 Answers

It is not presented in 20.04 LTS repositories because Python 2 deprecated stuff, but you can install it manually:

mkdir -p ~/Downloads/fslint
cd ~/Downloads/fslint
wget
wget
wget
sudo apt-get install ./*.deb

and enjoy using it by running fslint-gui executable.

For 20.10 the solution is a bit longer

mkdir -p ~/Downloads/fslint
cd ~/Downloads/fslint
wget
wget
wget
wget
wget
wget
sudo apt-get install ./*.deb

There's also unofficial Snap package created recently, which just packs latest fslint version available in Ubuntu 18.04.

sudo snap install fslint-unofficial

To work with files in external media use snap connect fslint-unofficial:removable-media.

An issue has been opened about it on the official github. Looks like obsolete dependencies are the cause here.

czkawka is a modern clone written in Rust, which has the same UI and some more features. I can definitely recommend that one.

According to their own benchmarks it is even 10 times faster than fslint

The following worked again today for me to get the very ultimate fslint 2.47 in a fresh 20.04.4 (from forum.ubuntu-fr.org don't worry with errors, we fix them on the walk):

mkdir -p ~/Documents/fslint/pygtk
cd ~/Documents/fslint/pygtk
wget
sudo dpkg -i python-gtk2_2.24.0-5.1ubuntu2_amd64.deb
sudo apt install -f
wget
sudo dpkg -i python-glade2_2.24.0-5.1ubuntu2_amd64.deb
sudo apt install -f
cd ..
sudo apt install git
git clone fslint-2.47
cd fslint-2.47
sudo apt install debhelper
dpkg-buildpackage -I.git -rfakeroot -tc
sudo dpkg -i ../fslint_2.47-1_all.deb
cd ../..
sudo apt purge git debhelper
sudo apt clean
sudo apt update
sudo apt full-upgrade
sudo apt-get clean
sudo apt-get autoclean
sudo apt autoremove --purge

Then once done and tested with fslint-gui you can:

rm -rf ~/Documents/fslint