Renaming by prefix.

#!/bin/bash

# Renaming files by prefix
# SH 130902

#Example:
#Lots of files named aaa001.txt to aaa069.txt need to be renamed to bbb001.txt and so on...you get the idea.

OLDPREFIX=aaa
NEWPREFIX=bbb

for FILE in "$OLDPREFIX"*
do
NEWNAME=`echo "$FILE" | sed -e "s/^${OLDPREFIX}/$NEWPREFIX/"`
mv "$FILE" "$NEWNAME"
done

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