Homebrew notes

How to list installed packages

Try these options:

brew list  
brew list --versions  
brew list --cask  
brew leaves  
brew deps --tree --installed  
brew bundle dump && cat Brewfile && rm Brewfile  

source: https://apple.stackexchange.com/questions/101090/list-of-all-packages-installed-using-homebrew

How to list all files installed by a package

Try these options:

brew list <package-name>  
brew list --verbose mysql  
brew ls --verbose mysql  

How to update a package, upgrade a package

brew upgrade pyenv  

How to replay the ‘caveats’ section of a package

brew info <name>