There are several recipe managers for Linux. There is (descriptions are from
Synaptic, the package manager):

AnyMeal is a Linux recipe database software developed using MySQL andXML. It can
manage a cookbook with more than 100,000 recipes, thereby
allowing to search, display, edit, import and export them. AnyMeal is designed
to be lean and flexible.

Gourmet Recipe Manager is a gtk-based recipe organizer and shopping list
generator intended for the GNOME desktop environment (though itdoes not need all
the GNOME libraries). Gourmet can import Mealmaster(tm) files and can export
recipes in a number of formats, including text, RTF and web pages. Gourmet also
can calculate nutritional information for recipes.

Krecipes is a KDE application designed to manage recipes. It can help you to do
your shopping list, search through your recipes to find what you can do with
available ingredients and a diet helper. It can also import or exportrecipes
from files in various format (eg RecipeML or Meal-Master) or from
databases. KDE is a Linux desktop manager but Krecipes will run on Gnome (the
desktop manager that comes with Ubuntu). *

To install a program in Ubuntu you do not need to search for files. Instead you
choose them from a list on a program called a package manager. Once you tell the
package manager to install the program it will download the necessary files,
install them and make an icon in the menu in an organized way. The package
manager is called Synaptic or you can go the the menu and choose Add and
Remove.. It is dead simple (most of the time).

*Aside: When we are talking about KDE and Gnome we are talking about a different
look and feel. Ubuntu supports a variety of desktop managers, but it comes with
only one (Gnome). You can add other desktops or programs made for other
desktops. There isn't really a Windows equivalent since everything is from one
source, Microsoft. In Linux, developers can choose from a variety of sources,
called projects. They work independently, but sometimes work together so that
applications can work from one environment to the other. KDE and Gnome are
written in different programming languages. Programs made to work in one
environment will work in another, but may look slightly different. People have
rather strong opinions about which is the best desktop, but in the end it does
not change what is available to you, just how you work, what things look like
and configuration options.