First, you need to edit the /etc/nginx/nginx.conf file by typing the vi command:
$ sudo vi /etc/nginx/nginx.conf
In HTTP (server/location) section add the following directive to set the maximum allowed size in 10MB:
Save and close the file.
Test nginx configuration for error
Run the following command:
$ sudo nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful
If no error means, restart the nginx web server.
$ sudo systemctl reload nginx
$ sudo service nginx reload
Verify the configuration by uploading a large file. Make sure you watch nginx error log too:
$ sudo tail -f /var/log/nginx/error.log
How to configure php to accept upload up to 10MB
Edit your php.ini file and make sure the following two-line present in it:
$ sudo vi /etc/php.ini
Append or edit as follows:
Save and close the file. Restart your Nginx PHP-fpm service:
$ sudo systemctl start php-fpm
$ sudo /etc/init.d/php-fpm restart
# /usr/local/etc/rc.d/php-fpm restart
Now upload a file and test it.