# tar -zxvf jdk-8u144-linux-x64.tar.gz
vi /etc/profile
export JAVA_HOME="/usr/local/java/jdk1.8.0_144"
export CATALINA_HOME="/usr/local/tomcat/apache-tomcat-9.0.0.M22"
export PATH=$PATH:$JAVA_HOME/bin:$CATALINA_HOME/bin
export CLASSPATH=$JAVA_HOME/jre/lib/tools.jar:$JAVA_HOME/bin/tools.jar:$JAVA_HOME/common/lib/servlet-api.jar
source /etc/profile