Restart Nginx Ubuntu 16.04
Why do you Need to Restart Nginx?
When you deploy your web application, sometimes you need to restart your web server (Nginx) to ensure that all the settings are applied correctly. There are several reasons why you might need to restart Nginx in Ubuntu 16.04. For example if you are upgrading your Nginx version, if you are changing its configuration, if you are adding a new feature, or if you need to restart the service in order to apply new security settings.
How to Restart Nginx in Ubuntu 16.04?
Restarting Nginx in Ubuntu 16.04 can be done with a few simple commands. The first step is to use the service command and tell it to restart the Nginx process. Open a terminal and type the following command:
sudo service nginx restart
This command will tell Ubuntu to restart the Nginx process. If the command is successful, you should see the following output:
Restarting nginx…done
Note that this command won’t restart any services that rely on Nginx. If you need to restart those services, you must do so manually.
How to Check Nginx’s Logs in Ubuntu 16.04?
Once you have restarted the Nginx service, you may want to check its logs to ensure that everything is working correctly. You can do this by using the tail command. Open a terminal and type the following command:
tail -f /var/log/nginx/error.log
This command will display the log entries for Nginx in real-time. You can use this command to monitor the log entries as they are generated, and take appropriate action when an error is detected. Note that you must have root permissions in order to access these log files.
What to do if Nginx Does not Start After a Restart?
If Nginx does not start after a restart, it typically means that there is an error in its configuration. In order to determine the cause of the problem, you should check the Nginx error log. This log can be found in the /var/log/nginx directory. You can open a terminal and view the log with the cat command:
cat /var/log/nginx/error.log
Once you have identified an error, you can edit the Nginx configuration file with the command:
sudo nano /etc/nginx/nginx.conf
Make the necessary changes to the configuration and restart the service again. Note that you may need to restart other services that rely on Nginx after making changes to the configuration.
What to do if Nginx is Not Listening?
If Nginx is not listening on port 80 (the default port for HTTP traffic), it means that there is another service running on that port. In order to determine which service is listening on port 80, you can use the netstat command:
netstat -tulpn | grep :80
This command will display the process name and process ID for the service that is listening on port 80. You can then stop that service and restart Nginx. In some cases, you may need to edit the Nginx configuration file and change the port on which Nginx is listening. To do this, open the configuration file with nano:
sudo nano /etc/nginx/nginx.conf
Look for the listen directive and change it to the desired port. Save the file and then restart Nginx.
How to Check if Nginx is Running Correctly?
Once you have restarted Nginx, you can check if it is running correctly by using the curl command. Open a terminal and type the following command:
curl -I http://localhost
This command should return the HTTP headers from your web server. If the response includes the “Server” header with the value “nginx” then you know that Nginx is running. If the response does not include the “Server” header, then there is an issue with your configuration.
Conclusion
In this tutorial, we have discussed how to restart Nginx in Ubuntu 16.04 and how to troubleshoot any issues that may arise. We also discussed how to check the Nginx logs in order to troubleshoot any problems that may arise. Finally, we discussed how to check if Nginx is running correctly.
FAQs
Q1: How do I restart Nginx in Ubuntu 16.04?
A1: You can restart Nginx in Ubuntu 16.04 with the command: sudo service nginx restart
Q2: How do I check Nginx’s logs?
A2: You can check Nginx’s logs in Ubuntu 16.04 with the command tail -f /var/log/nginx/error.log
Q3: How do I check if Nginx is running correctly?
A3: You can check if Nginx is running correctly by using the curl command: curl -I http://localhost
Thank you for reading this article. Please read other articles for more information.
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