Mac 设置环境变量 PATH 和查看 PATH

前置科普

Mac 系统的环境变量地址：

系统级别的

/etc/profile, /etc/paths 系统启动就会加载

当前用户级别的

~/.bash_profile, ~/.bash_login, ~/.profile,~/.bashrc 如果~/.bash_profile存在，后面几个就会被忽略【~/.bashrc没有上述规则】

PATH 语法

export PATH=$PATH:<PATH 1>:<PATH 2>:<PATH 3>:---:<PATh N>

修改完  source ~/.bash_profile 刷新环境变量
// eg
export PATH="/Users/username/.npm-global/bin:$PATH"
export ANDROID_HOME=/Users/username/Library/Android/sdk
export PATH=$PATH:/Users/username/Library/Android/sdk/emulator
export PATH=$PATH:/usr/local/mysql/bin
export NVM_DIR="$HOME/.nvm"
export JAVA_HOME=$(/usr/libexec/java_home)
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
export PATH="/Users/username/flutter/bin:$PATH"
export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

常用命令

• 查看已经存在的环境变量 export
• 查看当前用户的环境变量 echo $PATH