REXX equivalent in (Ubuntu) Linux?

[Stephen]

I want to do a big rename of files on my Linux system.

I have ripped a large number of CD's, and the filenames start with the 
track number. But they go 1,2,3 ...10,11,12

When my PS3 accesses my (Linux) media server, it sees these as 
10,11,12,1,2....

So to get the right order I want to change the files to 01,02,03...


The files are in directories:

/home/stephen/music/*artist*/*album*/filenames

What should I look at?

BASH???

Thanks
Stephen
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