Fixing the Nginx Service Job Error: Solving Control Process Exit with Error Code Issues

In this guide, we will cover how to troubleshoot and fix the Nginx Service Job Error, which is commonly encountered when the Nginx service fails to start or restart. The error message usually looks like this:

Job for nginx.service failed because the control process exited with error code.

Follow the steps provided in this guide to resolve the issue and ensure the smooth functioning of your Nginx service.

Table of Contents

Step 1: Check Status and Error Logs

The first step in troubleshooting the error is to check the status of the Nginx service and review the error logs. Run the following command to check the status:

sudo systemctl status nginx

To access the error logs, use the following command:

sudo tail -n 20 /var/log/nginx/error.log

This command will display the last 20 lines of the error log. Review the logs to identify any potential issues.

Step 2: Identify and Fix Configuration Errors

In many cases, the Nginx Service Job Error is caused by configuration errors. To check for syntax errors in your configuration files, run the following command:

sudo nginx -t

If there are any errors, the output will indicate the problematic files and lines. Fix the errors in the configuration files and re-run the command to ensure there are no remaining issues.

Step 3: Resolve Port Conflicts

Another common cause of the error is port conflicts. If another service is using the same port as Nginx, it will prevent Nginx from starting. To identify which process is using the conflicting port, use the following command (replace 80 with the port your Nginx is using):

sudo lsof -i :80

If there is a conflicting process, either stop the process or change its port to resolve the conflict.

Step 4: Check File Permissions

Incorrect file permissions can also cause the Nginx Service Job Error. Ensure that the Nginx user has the necessary permissions to access the configuration files, directories, and resources.

For example, to change the ownership of the Nginx configuration directory, use the following command:

sudo chown -R www-data:www-data /etc/nginx

Replace www-data with the appropriate user and group for your system.

Step 5: Restart the Nginx Service

After addressing the issues identified in the previous steps, attempt to restart the Nginx service using the following command:

sudo systemctl restart nginx

If the service starts successfully, the error has been resolved. If the issue persists, review the error logs and configuration files again to identify any remaining issues.


Q1: What is the default location of the Nginx error log?

The default location of the Nginx error log is /var/log/nginx/error.log. However, this location can be changed in the Nginx configuration file.

Q2: How do I change the Nginx port number?

To change the Nginx port number, edit the Nginx configuration file (usually located at /etc/nginx/sites-enabled/default). Locate the listen directive and update the port number. Save the changes and restart Nginx to apply the new configuration.

Q3: Can I use both Apache and Nginx on the same server?

Yes, it is possible to use both Apache and Nginx on the same server. However, you will need to configure them to use different ports to avoid port conflicts.

Q4: How do I check the Nginx version?

To check the Nginx version, run the following command:

nginx -v

Q5: How do I enable Nginx to start automatically upon system boot?

To enable Nginx to start automatically upon system boot, use the following command:

sudo systemctl enable nginx

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