### What apt affects
+* Your system's `preferences.list` file and `preferences.list.d` directory
* Your system's `sources.list` file and `sources.list.d` directory
* System repositories
* Authentication keys
-**Note:** Setting the apt module's `purge_sources_list` and `purge_sources_list_d` parameters to 'true' will destroy any existing content that you haven't declared through Puppet. The default for these parameters is 'false'.
+**Note:** This module offers `purge` parameters which will cause the module to destroy any configuration on the node's `sources.list(.d)` and `preferences.list(.d)` that you haven't declared through Puppet. The default for these parameters is 'false'.
### Beginning with apt
* `location`: Specifies an Apt repository containing the backports to manage. Valid options: a string containing a URL. Defaults:
- * Debian (squeeze): 'http://backports.debian.org/debian-backports'
- * Debian (other): 'http://ftp.debian.org/debian/'
+ * Debian (squeeze): 'http://httpredir.debian.org/debian-backports'
+ * Debian (other): 'http://httpredir.debian.org/debian'
* Ubuntu: 'http://archive.ubuntu.com/ubuntu'
* `pin`: *Optional.* Specifies a pin priority for the backports. Valid options: a number or string to be passed to the `id` parameter of the `apt::pin` define, or a hash of `parameter => value` pairs to be passed to `apt::pin`'s corresponding parameters. Default: '200'.