OS：ubuntu 16 查了很多资料，重启后，还是不能开机启动。

/etc/init.d/tomcat
chmod +x /etc/init.d/tomcat
update-rc.d tomcat defaults

能正常使用 service tomcat start|stop

#!/bin/sh
### BEGIN INIT INFO
# Provides:             tomcat
# Required-Start:       $remote_fs $network
# Required-Stop:        $remote_fs $network
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short Description:    the tomcat Java Application Server
### END INIT INFO

export JAVA_HOME=/opt/jdk1.8.0_231
export JRE_HOME=$JAVA_HOME/jre
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.
export CATALINA_HOME=/opt/tomcat/

case "$1" in
start)
        ${CATALINA_HOME}/bin/startup.sh
        echo 'tomcat start success'
        exit 0
        ;;
stop)
        ${CATALINA_HOME}/bin/shutdown.sh
         echo 'tomcat stop success'
略