linux: rename multiple files with one command

We're going to do this simple task with a simple regex find+replace in sed:

for i in *.avi
do
    j=`echo $i | sed 's/mymovies/myflicks/g'`
    mv "$i" "$j"
done

Can also be written on a single line as:

for i in *.avi; do j=`echo $i | sed 's/find/replace/g'`; mv "$i" "$j"; done

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