Info/es

Está guía muestra cómo navegar a través de las páginas info utilizando la orden info.

¿Qué es info?
La mayoría de usuarios deberían estar familiarizados con el sistema de documentación. Aunque man es una buena herramienta para buscar rápidamente algunos términos adolece de la estructura de enlazar las páqinas estre sí. Aquí es donde aparece. Las páginas info se construyen utilizando las herramientas  que pueden enlazar con otras páginas, crear menús y, en general, facilitar la navegación. La siguientes sección repasa la disposición de las páginas info.

Disposición de las páginas info
Las páginas principales de info se almacenan en. Al contrario que en el estilo en el que disponen los directorios de man contiene una vasta y extensa colección de ficheros. Estos ficheros tienen el siguiente formato:

es el nombre de la página (por ejemplo: ). es una construcción opcional que designa otro nivel de nodos (normalmente se referencian por el nivel más alto del documento info en cuestión). Para ahorrar espacio, estas páginas info se comprimen utilizando el formato de compresión. Se pueden listar páginas info adicionales con la variable de entorno  (normalmente se define en varios ficheros en  files). Para comenzar, es importante conocer el fichero. Este fichero especial se utiliza cuando info se lanza sin argumentos. Contiene un listado de todas las páginas info disponibles para que los usuarios las puedan visualizar. Para comenzar a navegar a través de infor comenzaremos lanzándolo sin argumentos:

Ahora en el siguiente capítulo echaremos un vistazo a cómo se realiza la navigación básica en info.

Browsing with menus
Now that info is started, we're given a screen similar to this:

Right now there are a bunch of entries with an asterisk before them. These are menu items for navigating through different node levels. There are two ways of selecting menus. We'll look at the first now and the other way later. First off, we'll go ahead and look at the  info page. To do so, use the down arrow key until you reach the line for Wget:

Once you get to this line, hit the key to select the menu item. This will bring up the info page for  :

Now that we have an info page up, the next section will look at basic navigation.

Basic navigation
In terms of nodes, this is considered the  node for the wget page. Consider the  node to be the same as the table of contents for that particular info page. Now to navigate the actual page itself, you have a couple of different methods. First off is the standard info method. This is using the key to move forward a page and the / keys to move back a page. This is the recommended method as it automatically advances/retreats to the appropriate node in the document. This allows for a somewhat linear browsing for those used to man pages. Another way is through the / keys. These work, but they will not advance/retreat like // will. If you want to skip entire nodes without using //, you can also use the (advance backwards) and  (advance forwards) keys.

As mentioned earlier, there are 2 ways of navigating menus. The other way will now be described here. The numbers  can be used to reference to the first-ninth menu entries in a document. This can be used to quickly peruse through documents. For example, we'll use to reach the   menu entry. So press and it will bring up the   screen:

Now we're at the  screen. Here is a good time to note a few things. First off the top header section. This header shows the navigation capable from this particular screen. The page indicated by  can be accessed by pressing the  key, and the page indicated by   can be accessed by pressing the  key. Please note that this will only work for the same level. If overused you could round up in totally unrelated content. It's better to use //// to navigate in a linear fashion.

If for some reason you get lost, there are a few ways to get out. First is the key. This will take you straight to the toplevel (table of contents) for the particular info page you're browsing. If you want to return to the last page you looked out, you can do so with the key. If you want to go to the above level, you can do so with the key. Now that you have some idea of navigating a page, the next chapter will look at searching for content.

Navigating to other info pages
Now that you can navigate an individual info page, it's important to look at accessing other info pages. The first obvious way is to go to the info page through the  index listing of info pages. To get to the  index from deep within a document, simply press the  key. From there you can search for the appropriate page you want. However, if you know the actual page, there is an easier way through the  command. To go to an info page by name, type to bring up the prompt and enter the name of the page in parentheses:

This will bring up the libc page as shown here:

Now that we know how to go to info pages by name, the next section will look at searching for pieces of information using the info page's index.

Searching using an index
In this example we'll see how to lookup the  function of the c library using the   info page's index. You should still be at the libc info page from the last section, and if not, use the Goto node command to do so. To utilize the index search, hit the key to bring up the prompt, then enter your search term. We'll do so for  below:

After pressing enter upon completion of our query, we're brought to the  definition for  :

We've now successfully performed a search using the  info page index. However, sometimes what we want is in the page itself. The next section will look at performing searches within the page.

Searching using the search command
Starting from the previous location at the  node, we'll look at searching for the   variation of the   function. To perform a search, press the key to bring up the search prompt, and then enter the query (sprintf in this case):

Hit and it will show the result of the query:

And we have the function we need.

Conclusion
This concludes the overview of using info to view info pages. As always comments are both welcome and appreciated.

Additional Program Resources
In order to make things easier for those that wish to browse info pages through a more friendly graphical interface, the following are available:


 * - Convert info pages to a browse-able HTML format
 * -  based info viewer
 * - a  based info browser
 * - a  based info browser

The  browser   also allows you to browse info pages through the   URI.