How do I rename Multiple Files?

From http://pcunix.com/SCOFAQ/scotec1.html#rename :
You can't do it as you would in DOS, but you can do it.

First, the "mv" command is what renames a file- you are "moving" it to a new name.

To rename with wildcards, you need to write a simple shell script. This can be done with any shell, but shells like ksh make it easier. For example, here's a couple of scripts to
rename a bunch of uppercase file names to lowercase:

# [A-Z]* matches upper case names
for i in [A-Z]*
do
j=`echo $i | tr '[A-Z]' '[a-z]'`
mv $i $j
done


Note the backtics ("`") carefully.

With ksh this becomes easier:

#!/bin/ksh
typeset -l j
for i in [A-Z]*
do
j=$i
mv $i $j
done