Mac安装Homebrew，报错xxx Failed to co

由于是mac小白，之前安装了很多次homebrew都安装失败，今天偶然再安装一次居然成功了，下面是安装过程

1. 问题场景

按照网上教程使用以下命令安装homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

但是每次都报错，报错信息为curl: (7) Failed to connect to raw.githubusercontent.com port 443: Operation

2. 解决办法

1. 先下载Homebrew文件
   百度云 ,提取码: 4eti
2. 找一个目录存放这个文件，并改名为homebrew_install.rb，有时候可能是brew_install.rb
3. 测试curl命令是否可以正常使用；

curl

执行结果为：curl: try 'curl --help' or 'curl --manual' for more information，证明curl命令可以正常使用，若不可以，先解决curl的问题再进行下一步；

4. 进入homebrew_install.rb所在的文件夹，执行命令即可完成安装
   1.进入存放 homebrew_install.rb 的目录中，
   2.执行 ruby homebrew_install.rb, 根据提示输入电脑密码然后回车 安装就行了
5. 安装成功信息

 * [new tag]             2.3.0      -> 2.3.0
HEAD is now at aff92b3af Merge pull request #7606 from vitorgalvao/appcast-configuration-match
==> Tapping homebrew/core
Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'...
remote: Enumerating objects: 729931, done.
remote: Total 729931 (delta 0), reused 0 (delta 0), pack-reused 729931
Receiving objects: 100% (729931/729931), 295.30 MiB | 1.57 MiB/s, done.
Resolving deltas: 100% (482405/482405), done.
Tapped 2 commands and 5034 formulae (5,302 files, 323.7MB).
Already up-to-date.
==> Installation successful!

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  https://docs.brew.sh/Analytics

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==> Next steps:
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- Further documentation: 
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