- Edit /etc/default/tomcat8. At the very end, there should be a line that says AUTHBIND=no. Change this to say AUTHBIND=yes
- Edit /etc/tomcat8/server.xml. In this file, there is an XML tag that starts out with <Connector port=”8080″ …. Change this to be 80. There are two sections that you want to change this.
- Go to /etc/authbind/byport. Do the following(note: this assumes that tomcat is running as the tomcat8 user, which it will do if you installed it through apt)
$ cd /etc/authbind/byport
$ touch 80
$ chown tomcat8 80
$ chmod 744 80
- Restart Tomcat — $ systemctl restart tomcat8
You should now be able to access Tomcat on port 80.