在centos8下给tomcat注册systemctl服务时报错：
Process: 2688 ExecStart=/usr/local/tomcat/apache-tomcat-9.0.36/bin/startup.sh (code=exited, status=217/USER)
我的配置文件
[Unit]
Description=Tomcat9 servlet
After=syslog.target network.target
[Service]
Type=forking
User=tomcat
Group=tomcat
Environment="JAVA_HOME=/usr/lib/jvm/jre"
Environment="JAVA_OPTS=-Djava.awt.headless=true"
Environment="CATALINA_BASE=/usr/local/tomcat/apache-tomcat-9.0.36"
Environment="CATALINA_HOME=/usr/local/tomcat/apache-tomcat-9.0.36"
Environment="CATALINA_PID=/usr/local/tomcat/apache-tomcat-9.0.36/temp/tomcat.pid"
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"
ExecStart=/usr/local/tomcat/apache-tomcat-9.0.36/bin/startup.sh
ExecStop=/usr/local/tomcat/apache-tomcat-9.0.36/bin/shutdown.sh
[Install]
WantedBy=multi-user.target
最后查到是因为[Service]下的User和Group错了，没有这个用户和组，全部改成root就好了。
[Unit]
Description=Tomcat9 servlet
After=syslog.target network.target
[Service]
Type=forking
User=root
Group=root
Environment="JAVA_HOME=/usr/lib/jvm/jre"
Environment="JAVA_OPTS=-Djava.awt.headless=true"
Environment="CATALINA_BASE=/usr/local/tomcat/apache-tomcat-9.0.36"
Environment="CATALINA_HOME=/usr/local/tomcat/apache-tomcat-9.0.36"
Environment="CATALINA_PID=/usr/local/tomcat/apache-tomcat-9.0.36/temp/tomcat.pid"
Environment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC"
ExecStart=/usr/local/tomcat/apache-tomcat-9.0.36/bin/startup.sh
ExecStop=/usr/local/tomcat/apache-tomcat-9.0.36/bin/shutdown.sh
[Install]
WantedBy=multi-user.target
