Grails is an open-source web development framework, based on the Groovy programming language (which runs on the Java platform), so, to begin you will need the followings prerequisites:

• Install java development kit (JDK)
  
  1	sudo apt-get install openjdk-6-jdk

  
  (We’ll install version 6 of the OpenJDK for maximum compatibility with Grails.)
• Then, we need to install cURL in our OS.
  
  1	sudo apt-get install curl

• Once we have installed jdk and cURL, we are able to install Grails. To do so, lets install sdkman (SDK Manager). Note: You can see that in other tutorials called gvm, because it was renamed.
  
  1	curl -s "https://get.sdkman.io" | bash

• To finish the sdkman installation, it will ask you to run the following shell script.
  
  1	source "$HOME/.sdkman/bin/sdkman-init.sh"

• After that, then finally install Grails itself. To install the latest version of Grails simply run:
  
  1	sdk install grails

  
  or if you need an older version:
  
  1	sdk install grails 2.5.6

• Whenever it has finished, you will be able to try your installation:
  
  1 2 3 4

  cd /path/to/your/local/repo/ mkdir grailsproject cd grailsproject grails create-app grailsproject

  
  Then, enter the newly-created project directory and run it:
  
  1 2	cd grailsproject grails run-app

  
  After installing all dependencies, it will show you a local url like the following where you will be able to see the default Grails application:

  http://YOUR_LOCAL_IP:8080/grailsproject 

  You have successfully installed Grails for your development environment!

Note: If you want to change between different Grails versions you can do the following:

1	sdk use grails 2.1.1

Moreover, if you want to check which one is your current Grails version, lets use the following command:

1	sdk current grails