1. tomact 解压到/usr/local/tomcat下
2.vim /usr/local/tomcat/bin/catalina.sh
在OS specific support.前加上 （注意java 安装目录）
JAVA_HOME=/usr/java/jdk1.8.0_161
JRE_HOME=$JAVA_HOME/jre
3.配置tomcat service 文件
vi /usr/lib/systemd/system/tomcat.service
输入：
[Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
[Service]
Type=oneshot
ExecStart=/usr/local/tomcat/bin/startup.sh
ExecStop=/usr/local/tomcat/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target
4.允许开机启动
systemctl enable tomcat
5.启动，查看状态，重启，关闭 tomcat
systemctl start tomcat.service
systemctl status tomcat.service
systemctl restart tomcat.service
systemctl stop tomcat.service