Ubuntu – How to get Scilab 6.1.0 working on Ubuntu 20.04 LTS

20.04aptjavapackage-managementscilab

I have installed clean Ubuntu MATE 20.04 LTS and installed Scilab from repository here with

sudo apt-get update
sudo apt-get install scilab

After installation I tried to launch it from GUI (Applications → Other → Scilab) – it does not start.
Then I tried to launch it from terminal with scilab command. Terminal output is as follows:

$ scilab
...
Scilab cannot create Scilab Java Main-Class (we have not been able to find the main Scilab class. Check if the Scilab and thirdparty packages are available).

so it can't find Java again. I reported bug 1870813 about this problem. But as usual there is no reaction from package maintainers.

What should I do to get Scilab 6.1.0 working on Ubuntu 20.04 LTS?

Best Answer

It is known that Scilab is working normally in the Ubuntu 20.10, so one can download packages from it and install into the 20.04 LTS system:

mkdir -p ~/Downloads/scilab
cd ~/Downloads/scilab

wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-cli_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-data_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-doc-fr_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-doc-ja_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-doc-pt-br_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-doc_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-full-bin_6.1.0+dfsg1-6build2_amd64.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-include_6.1.0+dfsg1-6build2_amd64.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-minimal-bin_6.1.0+dfsg1-6build2_amd64.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab-test_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/scilab/scilab_6.1.0+dfsg1-6build2_all.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/h/hdf5/libhdf5-103-1_1.10.6+repack-2_amd64.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/h/hdf5/libhdf5-hl-100_1.10.6+repack-2_amd64.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/libm/libmatio/libmatio9_1.5.17-5_amd64.deb

sudo apt-get install ./lib*.deb
sudo apt-get install ./scilab*.deb

But anyway it is strange method, and the Scilab packages should be fixed on the repository level by its maintainers.

* Repository-based method (Scilab itself and ATOMS will not work)

Update 2020-12-07. Nowadays Scilab is broken again as indicated in bug 1884277.

* Binary download method (fully-functional, seems to be really recommended)

So if you need fully-functional Scilab you should remove deb-packaged version with

sudo apt-get purge scilab scilab scilab-cli scilab-data scilab-doc scilab-full-bin scilab-include scilab-minimal-bin scilab-sivp scilab-test
sudo apt-get autoremove

and use latest binary archive 6.1.0 from official site and run the commands below (download, extract, add to PATH, set shortcuts and MIME-association):

mkdir ~/Software
cd  ~/Software
wget https://www.scilab.org/download/6.1.0/scilab-6.1.0.bin.linux-x86_64.tar.gz
tar -xzf scilab-6.1.0.bin.linux-x86_64.tar.gz
cd scilab-6.1.0
echo "PATH=$PATH:/home/$USER/Software/scilab-6.1.0/bin" >> ~/.bashrc
echo "PATH=$PATH:/home/$USER/Software/scilab-6.1.0/bin" >> ~/.profile
mkdir -p ~/.local/share/applications
cp -a ~/Software/scilab-6.1.0/share/{icons,applications,mime} ~/.local/share/
update-mime-database ~/.local/share/mime/
update-menus

The ATOMS and other components will work as expected. Do not forget to install build-essential package to run Xcos Modelica simulations.

* AppImage download method (fully-functional)

We need to download the latest release from corresponding page or manually:

mkdir ~/Software
cd ~/Software
wget https://github.com/davidcl/Scilab.AppDir/releases/download/6.1.0-1/Scilab-x86_64.AppImage
chmod +x Scilab-x86_64.AppImage
ln -s Scilab-x86_64.AppImage scilab

and then add it to PATH with

echo "PATH=$PATH:/home/$USER/Software/" >> ~/.bashrc
echo "PATH=$PATH:/home/$USER/Software/" >> ~/.profile

As the result you will get Scilab working. But there is no MIME associations (yet).

If you want to get Scilab 5.5.2 working on Ubuntu 18.04.1 LTS see other answer. But be careful with libcurl4 removal!

Best Answer

Related Solutions

Ubuntu – After latest updates Scilab 5.5.2 does not start on Ubuntu 16.04.3 LTS (amd64, AMD A4-4000 APU)

Ubuntu – How to get Scilab 6.0.1 working on Ubuntu 18.04 LTS

* Repository-based method (Scilab itself and ATOMS will not work)

* Binary download method (fully-functional, seems to be really recommended)

* AppImage download method (fully-functional)

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