react-native mac
brew
brew又叫homebrew是mac上的软件管理工具，软件安装和软件卸载
官网：brew.sh
安装：
brew install git or brew uninstall git
brew search /wge*/
brew list :列出安装的软件
brew update
brew info
brew deps ：显示软件包依赖
mac 命令：
mkdir
rmkdir
mvdir
pwd
卸载java
Note:
Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time that you perform an update of the OS
步骤：
1. Go to /Library/Java/JavaVirtualMachines.
2.Remove the directory whose name matches the following format by executing the rm command as a root user or by using the sudo tool:
/Library/Java/JavaVirtualMachines/jdk-interim.update.patch.jdk
$ rm -rf jdk-12.jdk
访问java.com
软件安装目录就是在usr/bin里面
Windows下管理软件的叫做chocolatey
choco