linux开机启动服务配置

在/usr/lib/systemd/system目录下增加tomcat8.service文件，内容如下：
vi /usr/lib/systemd/system/tomcat8.service
[Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target

[Service]
Type=forking

或者在tomcat/bin/catalina.sh中添加CATALINA_PID="$CATALINA_BASE/tomcat.pid"

PIDFile=/usr/tomcat/apache-tomcat-8.5.50/tomcat.pid
Environment="JAVA_HOME=/usr/java/jdk1.8.0_241"
ExecStart=/usr/tomcat/apache-tomcat-8.5.50/bin/startup.sh
ExecStop=/usr/tomcat/apache-tomcat-8.5.50/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

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如果[Service]节不加PIDFile=/usr/tomcat/apache-tomcat-8.5.50/tomcat.pid，

应该在bin/catalina.sh中添加CATALINA_PID="$CATALINA_BASE/tomcat.pid"

Copy CATALINA_BASE from CATALINA_HOME if not already set

[ -z "$CATALINA_BASE" ] && CATALINA_BASE="$CATALINA_HOME"

设置pid。一定要加在CATALINA_BASE定义后面，要不然pid会生成到/下面

CATALINA_PID="$CATALINA_BASE/tomcat.pid"
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重新加载一下配置。每次改动后也要重新加载

systemctl daemon-reload

//执行systemctl enable tomcat使tomcat8随开机启动
systemctl enable tomcat8.service

设置允许开机自启动

systemctl enable tomcat8

启动服务

systemctl start tomcat8

查看状态

systemctl status tomcat8

查看服务是否激活

systemctl is-active tomcat8

其它命令

禁止开机启动

systemctl disable tomcat8

停止服务

systemctl stop tomcat8

重启服务

systemctl restart tomcat8

查看所有已启动的服务

systemctl list -units --type=service

nginx.service自启动
vi /usr/lib/systemd/system/nginx.service
[Unit]
Description=nginx
After=network.target

[Service]
Type=forking
ExecStart=/opt/nginx/sbin/nginx
ExecReload=/opt/nginx/sbin/nginx reload
ExecStop=/opt/nginx/sbin/nginx quit
PrivateTmp=true