What do you do on Linux when you want to rename, copy or move many files together in the same way, e.g. replacing all files named "donkey01.jpg" as "horse01.jpg" ? There is plenty of GUI utilities, but sometimes a quick and cheap shell hack is needed. Here you go: the magics of sed and shell scripting in a one liner.
for i in `ls *`; do cp $i `echo $i | sed "s/search/replace/g"`; done