Output of brew doctor

Last login: Sun Jan 10 12:34:05 on ttys000
/Users/admin/.zshrc:4: command not found: hub
[~] ruby-2.2.1 $ 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: /usr/local/Frameworks isn't writable.

This can happen if you "sudo make install" software that isn't managed
by Homebrew. If a formula tries to write a file to this directory, the
install will fail during the link step.

You should probably change the ownership and permissions of /usr/local/Frameworks
back to your user account.
  sudo chown -R $(whoami) /usr/local/Frameworks

Warning: /usr/local/Cellar isn't writable.

You should probably change the ownership and permissions of /usr/local/Cellar
back to your user account.
  sudo chown -R $(whoami) /usr/local/Cellar

Warning: The /usr/local is not writable.

You should probably change the ownership and permissions of /usr/local
back to your user account.
  sudo chown -R $(whoami) /usr/local

Warning: Some directories in /usr/local/share/locale aren't writable.
This can happen if you "sudo make install" software that isn't managed
by Homebrew. If a brew tries to add locale information to one of these
directories, then the install will fail during the link step.

You should probably `sudo chown -R $(whoami)` them:
    /usr/local/share/locale
    /usr/local/share/locale/af
    /usr/local/share/locale/af/LC_MESSAGES
    /usr/local/share/locale/bg
    /usr/local/share/locale/bg/LC_MESSAGES
    /usr/local/share/locale/ca
    /usr/local/share/locale/ca/LC_MESSAGES
    /usr/local/share/locale/cs
    /usr/local/share/locale/cs/LC_MESSAGES
    /usr/local/share/locale/da
    /usr/local/share/locale/da/LC_MESSAGES
    /usr/local/share/locale/de
    /usr/local/share/locale/de/LC_MESSAGES
    /usr/local/share/locale/el
    /usr/local/share/locale/el/LC_MESSAGES
    /usr/local/share/locale/en@boldquot
    /usr/local/share/locale/en@boldquot/LC_MESSAGES
    /usr/local/share/locale/en@quot
    /usr/local/share/locale/en@quot/LC_MESSAGES
    /usr/local/share/locale/eo
    /usr/local/share/locale/eo/LC_MESSAGES
    /usr/local/share/locale/es
    /usr/local/share/locale/es/LC_MESSAGES
    /usr/local/share/locale/et
    /usr/local/share/locale/et/LC_MESSAGES
    /usr/local/share/locale/fi
    /usr/local/share/locale/fi/LC_MESSAGES
    /usr/local/share/locale/fr
    /usr/local/share/locale/fr/LC_MESSAGES
    /usr/local/share/locale/ga
    /usr/local/share/locale/ga/LC_MESSAGES
    /usr/local/share/locale/gl
    /usr/local/share/locale/gl/LC_MESSAGES
    /usr/local/share/locale/hr
    /usr/local/share/locale/hr/LC_MESSAGES
    /usr/local/share/locale/hu
    /usr/local/share/locale/hu/LC_MESSAGES
    /usr/local/share/locale/id
    /usr/local/share/locale/id/LC_MESSAGES
    /usr/local/share/locale/it
    /usr/local/share/locale/it/LC_MESSAGES
    /usr/local/share/locale/ja
    /usr/local/share/locale/ja/LC_MESSAGES
    /usr/local/share/locale/lt
    /usr/local/share/locale/lt/LC_MESSAGES
    /usr/local/share/locale/nl
    /usr/local/share/locale/nl/LC_MESSAGES
    /usr/local/share/locale/pl
    /usr/local/share/locale/pl/LC_MESSAGES
    /usr/local/share/locale/pt_BR
    /usr/local/share/locale/pt_BR/LC_MESSAGES
    /usr/local/share/locale/ro
    /usr/local/share/locale/ro/LC_MESSAGES
    /usr/local/share/locale/ru
    /usr/local/share/locale/ru/LC_MESSAGES
    /usr/local/share/locale/sk
    /usr/local/share/locale/sk/LC_MESSAGES
    /usr/local/share/locale/sl
    /usr/local/share/locale/sl/LC_MESSAGES
    /usr/local/share/locale/sr
    /usr/local/share/locale/sr/LC_MESSAGES
    /usr/local/share/locale/sv
    /usr/local/share/locale/sv/LC_MESSAGES
    /usr/local/share/locale/tr
    /usr/local/share/locale/tr/LC_MESSAGES
    /usr/local/share/locale/uk
    /usr/local/share/locale/uk/LC_MESSAGES
    /usr/local/share/locale/vi
    /usr/local/share/locale/vi/LC_MESSAGES
    /usr/local/share/locale/zh_CN
    /usr/local/share/locale/zh_CN/LC_MESSAGES
    /usr/local/share/locale/zh_TW
    /usr/local/share/locale/zh_TW/LC_MESSAGES

Warning: The /usr/local directory is not writable.
Even if this directory was writable when you installed Homebrew, other
software may change permissions on this directory. Some versions of the
"InstantOn" component of Airfoil or running Cocktail cleanup/optimizations
are known to do this.

You should probably change the ownership and permissions of /usr/local
back to your user account.
  sudo chown -R $(whoami):admin /usr/local