Homebrew / brew是什麼？
類似Ubuntu的apt-get，Fedora的yum，brew是Mac OS用的命令行安裝，卸載軟件工具。
Brew 命令
查看已經安裝的軟件包（package)
brew list
brew list --version
brew list
brew list --version
brew list brew list --version
這裡會有不少package是安裝某package和安裝的dependency。
查看top level packages
brew leaves
brew leaves
brew leaves
顯示每個package的description
brew leaves | xargs -n1 brew desc
brew list | xargs -n1 brew desc
brew leaves | xargs -n1 brew desc
brew list | xargs -n1 brew desc
brew leaves | xargs -n1 brew desc brew list | xargs -n1 brew desc
列出已經安裝package的dependency tree
brew deps --tree --installed
brew deps --tree --installed
brew deps --tree --installed
顯示需要更新的packages
brew outdated
brew outdated
brew outdated
查看Homebrew版本
brew -v
brew -v
brew -v
Homebrew安裝的軟件都放在哪裡？
目前用的是Homebrew 3.6.12，軟件安裝在
/usr/local/Cellar
/usr/local/Cellar
/usr/local/Cellar
