报错描述 情景一
1Panel在"主机-->进程守护"通过命令"nohup /opt/tomcat/bin/startup.sh > /opt/supersivor/tomcat/nohup.log &"创建守护进程，运行日志如下：
#----------------------------------------------------------
Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program
#----------------------------------------------------------
执行"ps -ef | grep -i tomcat"查不到tomcat相关进程，说明tomcat启动失败情景二
"java -version"输出如下，说明JDK已经安装且配置环境变量
java version "11.0.11" 2021-04-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.11+9-LTS-194)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.11+9-LTS-194, mixed mode)情景三
执行"startup.sh"或者"nohup /opt/tomcat/bin/startup.sh > /opt/supersivor/tomcat/nohup.log &"均可正常启动tomcat
