jo-tilkee

## gist:e052da8f252e976e12e4c2960cc402d8
#!bash

old_extension="sql"
new_extension="back"

for i in `ls *.$old_extension`
do
  file=`basename $i .$old_extension`
  mv $i $file.$new_extension
done
	#!bash

	old_extension="sql"
	new_extension="back"

	for i in `ls *.$old_extension`
	do
	file=`basename $i .$old_extension`
	mv $i $file.$new_extension
	done