In this subsection, we will show you the installation procedure of Scala on the Ubuntu distribution of Linux. Before starting, let's check to make sure Scala is installed properly. Checking this is straightforward using the following command:

$ scala -version

If Scala is already installed on your system, you should get the following message on your terminal:

Scala code runner version 2.11.8 -- Copyright 2002-2016, LAMP/EPFL

Note that, during the writing of this installation, we used the latest version of Scala, that is, 2.11.8. If you do not have Scala installed on your system, make sure you install it before proceeding to the next step. You can download the latest version of Scala from the Scala website at http://www.scala-lang.org/download/ (for a clearer view, refer to Figure 2). For ease, let's download Scala 2.11.8, as follows:

$ cd Downloads/
$ wget https://downloads.lightbend.com/scala/2.11.8/scala-2.11.8.tgz

After the download has been finished, you should find the Scala tar file in the download folder.

To extract the Scala tar file from its location or more, type the following command. Using this, the Scala tar file can be extracted from the Terminal:

$ tar -xvzf scala-2.11.8.tgz

Now, move the Scala distribution to the user's perspective (for example, /usr/local/scala/share) by typing the following command or doing it manually:

 $ sudo mv scala-2.11.8 /usr/local/share/

Move to your home directory issue using the following command:

$ cd ~

Then, set the Scala home using the following commands:

$ echo "export SCALA_HOME=/usr/local/share/scala-2.11.8" >> ~/.bashrc       
$ echo "export PATH=$PATH:$SCALA_HOME/bin" >> ~/.bashrc

Then, make the change permanent for the session by using the following command:

$ source ~/.bashrc

After the installation has been completed, you should better to verify it using the following command:

$ scala -version

If Scala has successfully been configured on your system, you should get the following message on your terminal:

Scala code runner version 2.11.8 -- Copyright 2002-2016, LAMP/EPFL

Well done! Now, let's enter into the Scala shell by typing the scala command on the terminal, as shown in the following figure:

$ sudo apt-get install scala