How to add node to nodequeue using a little code. You can make it automatic using Rules and PHP filter module(in core that adds option to add PHP code to textarea).
The simplest way to parse csv files. I am using external library that does the magic for you. Csv file should be separated by commas and strings with double quotes.
How to create forms that are submitted via ajax. To understand this tutorial you have to have a basic knowledge of Drupal programming and its form api.
You can use wget to download different web content. Sometimes in your bash scripts you need to do it in silent mode, so that there won't be printed any download information.