Postfix has several hundred configuration parameters that are controlled via the main.cf file. Fortunately, all parameters have sensible default values. In many cases, you need to configure only two or three parameters before you can start to play with the mail system. Here’s a quick introduction to the syntax:
Source: Postfix Basic Configuration
The easy method:
If your controller is installed on a 64bit operating system (default for recent versions), you should have no trouble following this method.
- Download Robo 3T from this link
- Install and create a profile for your local server, and port number 27117
- Connect to it, and in the left pane expand “ace” and then “collections”
- Right-click on “admin” and click “View documents”
- Open up this link to QuickHash.com
- In the “Input data” field, type the new password you would like to set, and in the “Salt” field type 9Ter1EZ9$lSt6 and click Generate and your new password hash will be shown in the output field.
- Copy the output value from QuickHash, and head back to Robo 3T to paste it in the “x_shadow” field.
- Head back to your UniFi login screen, unter your username and your new password and you should be straight in!
Source: How to reset UniFi controller admin password, without email, including 32bit – Rob’s Blog
Source: Using Themes | WordPress.org
cat /proc/sys/vm/swappiness
Source: SwapFaq – Community Help Wiki