Inspire Dolly is based on Matt Mullenweg’s Hello Dolly Plugin.When you enable this plugin, on every page of the admin area it shows a random quote that inspires you to be a fearless writer and produce awesome content.
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Download Inspire Dolly package file, extract inspire-dolly directory from ZIP file, upload it to WordPress Plugins directory ‘/wp-content/plugins/’ or install plugin from Plugin panel in WordPress Dashboard.
Activate Inspire Dolly via Plugin page.
If you are new to WordPress : Installing Plugins