As has already been said, bash brace expansion is quite powerful. It has many usecases, such as, diff file{.original,} mkdir -p path/{a,b,c}/folder for i

As has already been said, bash brace expansion is quite powerful. It has many usecases, such as, diff file{.original,} mkdir -p path/{a,b,c}/folder for i in image{001..060}; do echo $i; done Parameter Expansion is also equally useful, like changing a few characters in long names, mv ${i}.png ${i/imaeg/image}.png