When you make a copy of your site for development/testing purpose, you don’t need search engines index your site as it will cuase duplicate content.

To disable indexing of a website by search engines, create a file with name robots.txt with following content.

VLC Custom User Agent

VLC using custom HTTP User-Agent

To change User-Agent in VLC player, go to

Click on “Show more options” check box. In “Edit Options” text box, you can specify your User-Agent like

VLC Custom User Agent


To list all packages installed with brew

To see if a specific package installed, run

List open ports

Restart apache2

Disable Apache from starting on boot