1、macOS安装homebrew报错 LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54
// 执行下面这句命令，更换为中科院的镜像：
git clone git://mirrors.ustc.edu.cn/homebrew-core.git/ /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core --depth=1
// 把homebrew-core的镜像地址也设为中科院的国内镜像
cd "$(brew --repo)"
git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
// 更新
brew update
// 使用
brew install node
2、fatal: destination path '.' already exists and is not an empty directory
// 执行下面这句命令，更换为中科院的镜像：git clone git://mirrors.ustc.edu.cn/homebrew-core.git/ /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core --depth=1 然后报如上错误
方案：删除/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core这个目录，然后重新执行命令
3、Mac 上卸载node和npm卸载node,依次在终端执行下面的脚本
sudo npm uninstall npm -g
sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*
sudo rm -rf /usr/local/include/node /Users/$USER/.npm
sudo rm /usr/local/bin/node
sudo rm /usr/local/share/man/man1/node.1
sudo rm /usr/local/lib/dtrace/node.d
最后验证一下
node //command not found
npm //command not found
就卸载完了。
4、brew install node
4.1、下载卡在python下载那里，从官网下载并安装
4.2、继续安装，报错The 'brew link' step did not complete successfully
其实这里已经给出了方法：
执行第一个命令一般不会出现问题。直接回车就行。
执行第二个命令的时候我这里出现了一些问题：
说我没有 /usr/local/share/doc/...这一大堆的权限。
这个权限不是我们加入sudo的权限
然后我又在Stack Overflow上面查一下 有兴趣的可以看一下： [时空车走起](https://stackoverflow.com/questions/26647412/homebrew-could-not-symlink-usr-local-bin-is-not-writable)
输入命令行：
sudo chown -R `whoami`:admin /usr/local/share/doc/node 注意红色的地方我们可能不一样，需要换上你自己的没有权限操作的文件
5、npx react-native init AwesomeProject 报错如下提示，根据报错提示，进入AwesomeProject目录执行pod install
Error: Failed to install CocoaPods dependencies for iOS project, which is required by this template.
Please try again manually: "cd ./AwesomeProject/ios && pod install".
6、pod install 报错如下提示：
6.1、更新OpenSSL：brew upgrade openssl
6.2、更新ruby：brew install rbenv ruby-build
6.3、执行：pod install --repo-update
runk Repo update failed - 38 error(s):
CDN: trunk URL couldn't be downloaded: https://raw.githubusercontent.com/CocoaPods/Specs/master/Specs/3/2/5/FlipperKit/0.11.1/FlipperKit.podspec.json Response: Couldn't connect to server
7、如果 pod install --repo-update 失败，提示如下，执行：pod repo update --verbose， 成功后再执行pod install --repo-update。
注意：pod install --repo-update需要网络好，或者稳定的翻墙网络，如果继续失败切换翻墙、不翻墙执行。多试几次就成功了
CocoaPods was not able to update the
masterrepo. If this is an unexpected issue and persists you can inspect it running `pod repo update --verbose
参考文献
The 'brew link' step did not complete successfully
macOS安装homebrew报错 LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54
