TIL: Brace expansion

Today I learned about Bash brace expansion, a convenient way to generate multiple command arguments without repeating yourself.

It's especially handy when creating sibling directories:

mkdir /some/path/{a,b,c}

Which expands to:

mkdir /some/path/a /some/path/b /some/path/c

It also works nicely when renaming something without retyping the directory:

mv /some/path/{c,d}

Which expands to:

mv /some/path/c /some/path/d