operation not permitted, mkdir code example

Example: Errno::EPERM: Operation not permitted @ dir_s_mkdir - /usr/local/Cellar

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"