brew install coreutils
ln -s "${BREW_PREFIX}/bin/gsha256sum" "${BREW_PREFIX}/bin/sha256sum"

# Install some other useful utilities like `sponge`.
brew install moreutils
# Install GNU `find`, `locate`, `updatedb`, and `xargs`, `g`-prefixed.
brew install findutils
# Install GNU `sed`, overwriting the built-in `sed`.
brew install gnu-sed #--with-default-names
# Install a modern version of Bash.
brew install bash
brew install bash-completion2

# Switch to using brew-installed bash as default shell