[noise@unvalidatedinput]$ man brew_doctor

brew_doctor(1)                              User Manuals                              brew_doctor(1)

       brew doctor
                                                                        Mon Jan  2 20:18:40 GMT 2017

       Brew  Doctor  is  Homebrew  package  manager’s own self‐diagnosis tool. Very handy on OSX for
       troubleshooting potential problems with the brew setup.

       Here’s a sample run:

       $ brew doctor Please note that these warnings are just used to help the Homebrew  maintainers
       with  debugging  if  you  file  an issue. If everything you use Homebrew for is working fine:
       please don’t worry and just ignore them. Thanks!

       Warning: Homebrew’s sbin was not found in your PATH but you have installed formulae that  put
       executables in /usr/local/sbin.  Consider setting the PATH for example like so
         echo ’export PATH="/usr/local/sbin:$PATH"’ >> ~/.bash_profile

       Warning:  Some  installed  formula  are  missing dependencies.  You should ‘brew install‘ the
       missing dependencies:
         brew install doxygen qt5

       Run ‘brew missing‘ for more details.

Linux                                       January 2017                              brew_doctor(1)

[noise@unvalidatedinput]$ ∎