Download Jira:

wget http://www.atlassian.com/software/jira/downloads/binary/atlassian-jira-6.2-war.tar.gz

Extract it:

tar xzvf atlassian-jira-6.2-war.tar.gz

Edit atlassian-jira-6.2-war/edit-webapp/WEB-INF/classes/jira-application.properties

jira.home = /usr/local/www/jira-data-freebus

Create the directory and adapt permissions:

mkdir -p /usr/local/www/jira-data-freebus
chown www !$