A quickie question...

Well, two questions in one, really. (1) What's a simple way to rename all the files in a folder that are named a.b.c (for instance, glossy.jpg.1) to a.c.b (glossy.1.jpg)? (2) Where can I look for more documentation on whatever you used to make this possible? I'm used to whipping out quick scripts using QBasic or a text editor on the Windows side, but I'm not sure what tools are available for me in SuSE...