**Step by step to install Scala + Play Framework in Ubuntu 14.04 with Activator.**
 
Install Scala
```
sudo apt-get remove scala-library scala
wget http://www.scala-lang.org/files/archive/scala-2.11.6.deb
sudo dpkg -i scala-2.11.6.deb
sudo apt-get update
sudo apt-get install scala
```
Download and Install Play (the folder should have permission to write)
```
cd /opt
wget http://downloads.typesafe.com/typesafe-activator/1.3.2/typesafe-activator-1.3.2-minimal.zip
unzip typesafe-activator-1.3.2-minimal.zip
mv activator-1.3.2-minimal activator
```
Add the activator script to your PATH and execute Activator
```
cd /opt/activator
export PATH=$PATH:/opt/activator
source ~/.bashrc
chmod a+x activator
./activator
```
After that, check if the activator command is available
``activator -help``
So then, create your project
```
activator new my-first-app play-scala
cd my-first-app
```
To create play with console:
```
activator
```
To create play with UI:
```
activator ui
```
 
References: 
- https://www.playframework.com/documentation/2.3.x/NewApplication
- http://www.scala-lang.org/download/2.11.6.html
- https://typesafe.com/get-started