Please provide information and / or documentation.
You are technically migrating JIRA to another server . Even if you are just changing the url and port number the steps are still very similar.
https://confluence.atlassian.com/display/JIRA/Migrating+JIRA+to+Another+Server
There is a system admin page for the url and port number. when I get access to my JIRA installation, I will give you more information on which page it is.
https://confluence.atlassian.com/display/JIRA/Changing+JIRA's+TCP+ports
you can change this by editing the <JIRA_HOME>/conf/server.xml directly or running the <JIRA_HOME>/bin/config .sh for mac/linux or .bat for windows to edit your url and port. Make sure to shut down JIRA before making these changes.
See the url in the comment below for the documentation for this solution.
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