Installing Io language on Ubuntu

Sandro Mancuso · 23 Oct 2011

Since I'm new to Ubuntu and I had a hard time installing Io language, I've decided to record my steps. Hopefully I'll remember all of them and other people won't struggle as much as I did. I'm running Ubuntu 11.10.

The main problem I had was that I did not have all the dependencies needed to install Io and the installation was failing. The dependencies are yajl and libevent

If you've got then installed, you can skip the next steps.

NOTE: You will need to have cmake and make. You can install them running the following commands from the terminal:

sudo apt-get install cmake
sudo apt-get install make

Installing yajl

Download yajl from here:

  1. In my case it was:

Extract it into a folder.

Open the terminal and go to the folder you extracted yajl

Run the following commands

1.  mkdir build
2.  cd build
3.  cmake ..
4.  sudo make install

For more information, please check:

Installing libevent

Download libevent from here:

  1. In my case it was: libevent-2.0.15-stable.tar.gz

Extract it into a folder

Open the terminal and go to the folder you extracted libevent

Run the following commands

1.  ./configure
2.  make
3.  sudo make install

For more information please check: Also check the README file inside the .tar.gz for your version

Installing Io language

You can go to the Io language website and download the language or click here to go start downloading it. As there is no Ubuntu package for that, you will be downloading the Io's source code. This will point to Steve Dekorte's version. I ended up downloading Jeremy Tregunna's version. It should work the same. Check each one is the most up-to-date.

Download the Io version here:

Extract it into a folder.

Open the terminal and go to the folder you extracted Io

Run the following commands:

1.  mkdir build
2.  cd build
3.  cmake ..
4.  sudo make install

IMPORTANT: When running cmake .., you may get a few errors. Even then, try to run sudo make install. Some libraries may fail to compile because they are OS specific.

For mode information please check:


Now we just need to update so Io can be accessed from anywhere in your computer.

  1. From the terminal, type the following command: sudo gedit /etc/
  2. Add the following line to the file: include /usr/local/lib
  3. Save and close the file
  4. From the terminal run the following command: sudo ldconfig

Running Io

That's it. Hopefully now you will be able to open a terminal window and type: io You should see the Io runtime environment: Io> _


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Sandro Mancuso

Software craftsman, author, and founder of the London Software Craftsmanship Community (LSCC). Sandro has been coding since a very young age but only started his professional career in 1996. He has worked for startups, software houses, product companies, international consultancy companies, and investment banks.

During his career Sandro had the opportunity to work in a good variety of projects, with different languages, technologies, and across many different industries. Sandro has a lot of experience in bringing the Software Craftsmanship ideology and Extreme Programming practices to organisations of all sizes. Sandro is internationally renowned by his work on evolving and spreading Software Craftsmanship and is frequently invited to speak in many conferences around the world. His professional aspiration is to raise the bar of the software industry by helping developers become better at and care more about their craft.

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