tomcat 6 & tomcat 8.5 on same machine

tar xzf apache-tomcat-8.5.45.tar.gz

vi apache-tomcat-8.5.45/conf/server.xml

edit all port

create file apache-tomcat-8.5.45/bin/setenv.sh

edit setenv.sh :

export JRE_HOME=”path-of-jre-java-8″