This is a simple command line tool that I made for practicing rust.
You can install this by running:
cargo install chmod-convesion
$ chmod-conversion s rwx--x--x
711
$ chmod-conversion symbolic_to_octal rwx--x--x
711
$ chmod-conversion o 127
--x-w-rwx
$ chmod-conversion octal_to_symbolic 127
--x-w-rwx