To run a node.js app as a background service is to even after closing the node terminal, the app server needs to be kept running.
Methods to run node.js app as background service:
Method 1: The easiest method to make a node.js app run as a background service is to use the forever tool. The forever is a simple Command Line Interface Tool that ensures that a given particular script runs continuously without any interaction.
Command for Installation: The following command installs the forever tool in the app.
$ npm install forever -g
Command to Start forever: To start the forever tool, run the following commands replacing <app_name> with the name of the node.js app.
$ forever start /<app_name>/index.js
Method 2: The second method involves create a service file and manually starting the app and enabling the service to keep it running in the background.
Step 1: Create a new file <app_name>.service file replacing <app_name> with the name of the node.js app. Inside the files, enter the following values:
ExecStart=/var/www/<app_name>/app.js Restart=always User=nobody Group=nogroup Environment=PATH=/usr/bin:/usr/local/bin Environment=NODE_ENV=production WorkingDirectory=/var/www/<app_name>
Step 2: After configuring the service file,
Copy the <app_name>.service file into the /etc/systemd/system.
Step3: Start the app with the following command to make it run with the service file:
systemctl start <app_name>
Method 3: Another method which can be used to run a node.js app as a background by using nohup. The nohup is another Command Line Interface Tool which can be used to run a node.js app as a background service.
Run the following command to start the nohup replacing the <app_name> with the name of the node.js app:
$ nohup node /<app_name>/index.js &
The nohup command does not terminate this process even then the command terminal is closed.
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