How to change port number of Tomcat default to 80
# cd /opt/tomcat/conf
@ Edit <Connector port="80" protocol="HTTP/1.1"
$$$ Run below command after change port number 8080 to 80 in server.xml $$$
# cd /opt/tomcat/bin
# ./shutdown.sh
# ./startup.sh
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
# sudo apt-get install iptables
# apt install net-tools -y
# iptables -t nat -A PREROUTING -p tcp --dport 8080 -j REDIRECT --to-port 80
# 192.168.0.10