Where to find MODX, PHP and nginx error logs, and web server access logs, for troubleshooting your MODX sites.
MODX Manager Error Logs
The MODX Manager error log often includes useful information about problems that Snippets or Plugins may be experiencing. To see it, you have to have a MODX Manager login, with the correct permissions. In MODX version 2.3.x and later, the MODX Error Log can be found in the Manage > Reports > Error Log menu item.
Server Error Logs
It is often useful to watch error logs as you visit different sections of your site while troubleshooting. Using the SSH information listed at the bottom of the Summary tab of the Cloud in question, SSH into your cloud using a command line tool such as Terminal/terminal (OSX/Linux) or PuTTy (Windows).
To see the last 50 PHP errors and warnings printed to the terminal, use the following command:
tail -n50 /log/error.log
To "follow" your log, so you can watch new lines added to the log in realtime, use the -f flag:
tail -f /log/error.log
Stop following by pressing Ctrl+c.
You can combine the -n and -f flags as well:
tail -fn50 /log/error.log
PHP Error Logs
From a SSH connection, see PHP-related errors and warnings in the PHP error log: /log/error.log
Nginx Error Logs
From a SSH connection, see problems with the web server such as rewrite errors in the nginx error log: /log/nginx_error.log
Web Server Access Logs
If you need a copy of your nginx access logs, request a copy of them for the cXXXX.YYY.modxcloud.com site in question from the MODX Cloud Dashboard help tab.