application.css).
Goto Redmine's root folder
cd /var/www/redmine
Copy and unarchive theme
cp circle_theme-3_0_0.zip /var/www/redmine/public/themes cd /public/themes unzip circle_theme-3_0_0.zip
This would result in a directory-path to application.css like: /var/www/redmine/public/themes/cicle/stylesheets/application.css
Restart Redmine app
You now may need to restart Redmine so that it shows the newly installed theme in the list of available themes.
For the Phusion Passenger just touch the restart.txt file
touch tmp/restart.txt
Activate theme
Go to "Administration -> Settings" -> "Display" and select your newly created theme in the "Theme" drop-down list. Save your settings.