[Gllug] Removing special characters from filenames with bash

[Dylan]

Hi

I'm trying to sort out a script which will recurse a directory structure 
and rename any file or directory as follows:

A) upper case changed to lower case;
B) special characters removed (excepting last . );
C) spaces replaced with underscores.

I can do B and C with $(x//y/z) but can't see a way to do A without 
writing 26 statements. Is there a way to combine:

for x in {A..Z}

and

for x in "A a" "B b" ...

for example?

Cheers
Dylan
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