How to Install Logstash and Logstash Forwarder

May I know the details regarding the installation of Logtash and Logstash-forwarder in ubuntu 14.04
Thanks in Advance,
Kartheek Gummaluri

Here https://www.elastic.co/guide/en/logstash/current/getting-started-with-logstash.html#installing-binary
And here https://github.com/elastic/logstash-forwarder