Setting up Scala

On Linux via dpkg

On Debian-based distributions, including Ubuntu, the most straightforward way is to use the .deb installation file. Go to the Scala website. Choose the version you want to install then scroll down and look for scala-x.x.x.deb.

You can install the scala deb from command line:

sudo dpkg -i scala-x.x.x.deb

To verify that it is installed correctly, in the terminal command prompt:

which scala

The response returned should be the equivalent to what you placed in your PATH variable. To verify that scala is working:

scala

This should start the Scala REPL, and report the version (which, in turn, should match the version you downloaded).

Ubuntu Installation via Manual Download and Configuration

Download your preferred version from Lightbend with curl:

curl -O https://downloads.lightbend.com/scala/2.xx.x/scala-2.xx.x.tgz

Unzip the tar file to /usr/local/share or /opt/bin:

unzip scala-2.xx.x.tgz 
mv scala-2.xx.x /usr/local/share/scala

Add the PATH to ~/.profile or ~/.bash_profile or ~/.bashrc by including this text to one of those files:

$SCALA_HOME=/usr/local/share/scala
export PATH=$SCALA_HOME/bin:$PATH

To verify that it is installed correctly, in the terminal command prompt:

which scala

The response returned should be the equivalent to what you placed in your PATH variable. To verify that scala is working:

scala

This should start the Scala REPL, and report the version (which, in turn, should match the version you downloaded).

Mac OSX via Macports

On Mac OSX computers with MacPorts installed, open a terminal window and type:

port list | grep scala

This will list all the Scala-related packages available. To install one (in this example the 2.11 version of Scala):

sudo port install scala2.11

(The 2.11 may change if you want to install a different version.)

All dependencies will automatically be installed and your $PATH parameter updated. To verify everything worked:

which scala

This will show you the path to the Scala installation.

scala

This will open up the Scala REPL, and report the version number installed.