add startup service on ubuntu16.04--在ubuntu16.04添加服务

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本文介绍了如何在Ubuntu 16.04上安装服务脚本，创建systemd服务文件，并设置开机启动。首先安装必要组件，然后将脚本保存到指定位置。接着创建并保存systemd服务文件，如`myservice.service`。通过命令启动服务并设置开机启动，可以使用`systemctl`检查服务状态。若要停止和禁用服务，也有相应命令。注意，service文件通常位于`/etc/systemd/system`目录下，可根据实际情况查找。参考链接提供了更多详细信息。

In the simplest for using systemd service:

Install forever:
```
[sudo] npm install forever -g
```
Write and store the script to run in preferred location.

Write the Systemd service:

[Unit]
Description=forever service
After=network.target


[Service]
ExecStart=/home/george/.npm-global/bin/forever start /root/node/node_modules/.bin/www
ExecStop=/home/george/.npm-global/bin/forever stop /root/node/node_modules/.bin/www
Restart=always
RestartSec=10                       # Restart service after 10 seconds if node service crashes
StandardOutput=syslog               # Output to syslog
StandardError=syslog                # Output to syslog
SyslogIdentifier=nodejs-example


[Install]
WantedBy=multi-user.target

Save the systemd service file in /etc/systemd/system as myforever.service ( or with whatever name you like ).

Start the service and enable at start up.

sudo systemctl start myforever.service
sudo systemctl enable myforever.service

Check if it's running:

sudo systemctl status myforever.service

To stop and disable it any time:

sudo systemctl stop myforever.service
sudo systemctl disable myforever.service

NOTE:

This is a simplified version of a systemd service many options are available
The service can also be called myforever without the .service extension, systemd will pick the right file
This /home/george/.npm-global/bin/forever is where my node modules are kept, yours will be different. Find it with which forever

Additional Information:

https://www.axllent.org/docs/view/nodejs-service-with-systemd/

ref link: https://askubuntu.com/questions/894665/add-startup-service-on-16-04