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1. mac终端执行命令/bin/bash -c “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)”，无法建立连接或连接超时错误，错误信息如下：
   curl: (28) Failed to connect to raw.githubusercontent.com port 443 after 75059 ms: Couldn’t connect to server
   fatal: unable to access ‘https://​​github​​.com/Homebrew/brew/’: Failed to connect to github.com port 443: Operation timed out
   Failed to connect to raw.githubusercontent.com port 443: Connection refused
   解决：
   1）浏览器访问​​https://www.ipaddress.com​​，进入如下页面
   

2）页面下拉到如图位置，输入域名，点击搜索

浏览器滚动至接近最下方，利用终端ping搜索到的ip，要ping通

3）在/etc/hosts中添加ip映射，如果映射的ip不对，则会提示超时等连接错误信息

2. 长时间卡在 Downloading Command Line Tools for Xcode
   解决：
   1）终端输入：xcode-select --install
   2）mac根据提示在接通电源的情况下安装xcode-select

3. xcode-select: note: Command line tools are already installed. Use “Software Update” in System Settings or the softwareupdate command line interface to install updates
   解决：
   1）终端输入sudo xcode-select -p 查看xcode-select位置（默认在/Library/Developer/CommandLineTools）
   2）删除xcode-select：sudo rm -rf /Library/Developer/CommandLineTools
   3）重装xcode-select：xcode-select --install

4. error: 835 bytes of body are still expected96 MiB | 46.00 KiB/s
   fetch-pack: unexpected disconnect while reading sideband packet
   fatal: early EOF
   fatal: fetch-pack: invalid index-pack output
   Failed during: /usr/bin/git fetch --force origin
   解决：
   终端输入：git config --global http.postBuffer 524288000
   此时仍提示错误：Error: Failed to download https://formulae.brew.sh/api/formula.jws.json!
   Failed during: /opt/homebrew/bin/brew update --force --quiet
   如果还出现错误，建议删除homebrew并重新安装

用国内镜像源：
删除：/bin/zsh -c "$(curl-fsSLhttps://gitee.com/cunkai/HomebrewCN/raw/master/HomebrewUninstall.sh)"安装：/bin/zsh-c"$(curl -fsSL ​​https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"​​

以上创作全凭经历回忆，希望能够帮助到您。本人从事软件开发有5年多的时间了，现在真的好想自主创业，可没人脉没资源的自己难免产生着很多焦虑，这里希望同行的你能带给我一点鼓励，让我能在软件这行继续坚持下去。同时个人整理了一些主流平台的学习资源，需要者联系