How to change the port of Tomcat from 8080 to 80?

Question

I want to execute my web app as http://localhost.

Answer 1

On Ubuntu and Debian systems, there are several steps needed:

1. In server.xml, change the line to have port="80".

2. Install the recommended (not required) authbind package, with a command like:

   sudo apt-get install authbind

3. Enable authbind in the server.xml file (in either /etc/tomcat6 or /etc/tomcat7) by uncommenting and setting the line like:

   AUTHBIND=yes

All three steps are needed.