The brew command

Use man brew to view the manpage.

Command	Description
brew --cache	Print the path where Homebrew caches downloads (usually ~/Library/Caches/Homebrew)
brew --cellar	Print the real path to your Homebrew Cellar (usually /usr/local/Cellar)
brew --config	Print some useful system configuration
brew --env	Print Homebrew’s environment
brew --prefix [formula]	Print where formula is installed
brew --prefix	Print the real path to your Homebrew prefix (usually /usr/local)
brew audit	Audit all formulae for common code and style issues
brew cleanup [formula]	Remove older versions from the Cellar for all (or specific) formulae1
brew create [url]	Generate formula for downloadable file at url, then open it in $BREW_EDITOR or $EDITOR2
brew create tarball-url --cache	Generate formula (including MD5), then download the tarball
brew create --fink formula	Open Fink’s search page in your browser, so you can see how they do formula
brew create --macports [formula]	Open MacPorts’ search page in your browser, so you can see how they do formula
brew doctor	Check your Homebrew installation for common issues
brew edit formula	Open formula in $HOMEBREW_EDITOR or $EDITOR
brew fetch --force -v --HEAD formula	Download the source package for formula. For tarballs, also prints MD5 and SHA1 checksums.
brew home	Open Homebrew’s homepage in your browser
brew home formula	Opens formula ’s homepage in your browser
brew info	Summarize all installed packages
brew info [formula]	Print all available info formula (regardless of whether formula is installed)
brew info --github [formula]	Open Github’s History page for formula in your browser
brew install [formula]	Install formula
brew install --HEAD formula	Install the HEAD version of formula (if its formula defines HEAD)
brew install --force --HEAD formula	Install a newer HEAD version of formula (if its formula defines HEAD)
brew link formula	Symlink all installed files for formula into the Homebrew prefix3
brew list [formula]	List all installed files for formula (or all installed formulae with no arguments )
brew outdated	List formulae that have an updated version available (brew install formula will install the newer version)
brew prune	Remove dead symlinks from Homebrew’s prefix4
brew remove formula	Uninstall formula
brew search	List all available formula
brew search formula	Search for formula in all available formula
brew search /formula/	Search for the regex /formula/ in all available formula
brew unlink formula	Unsymlink formula from Homebrew’s prefix
brew update	Update formulae and Homebrew itself
brew upgrade	Install newer versions of outdated packages

You can update outdated packages like so:

brew install `brew outdated` (or brew outdated | xargs brew install (or brew upgrade))

¹ To delete a specific version, just go to the folder in the Cellar and rm -rf it; alternatively, drag it to the trash in Finder.

² Homebrew tries to guess the formula name and version. If it fails, you’ll have to make your own template. I suggest copying wget ’s.

³ Symlinking is automatically performed when installing formulae. It’s useful for DIY installation, or swapping out versions of a package you have multiple installs of.

⁴ This is generally not needed. However, it can be useful if you are doing DIY installations.