jdk、tomcat
export JAVA_HOME=/usr/local/jdk/jdk1.8.0_311
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
groupadd tomcat
useradd -g tomcat tomcat
usermod -L tomcat
wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.62/bin/apache-tomcat-9.0.62.zip
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080