Homebrew-使用总结
报错
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执行
brew update命令，报错：fatal: Could not resolve HEAD to a revision Already up-to-date.解决方法：
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执行：
brew update --verbose：执行结果：
Checking if we need to fetch /opt/homebrew... Checking if we need to fetch /opt/homebrew/Library/Taps/homebrew/homebrew-core... Fetching /opt/homebrew... Updating /opt/homebrew... Branch 'master' set up to track remote branch 'master' from 'origin'. Switched to and reset branch 'master' Your branch is up to date with 'origin/master'. Switched to and reset branch 'stable' Current branch stable is up to date. Updating /opt/homebrew/Library/Taps/homebrew/homebrew-core... fatal: Could not resolve HEAD to a revision Already up-to-date. 打开报错路径：
cd /opt/homebrew/Library/Taps/homebrew/homebrew-core；-
执行：
ls -al：执行结果：
total 0 drwxr-xr-x 3 hsh admin 96 10 14 16:27 . drwxr-xr-x 3 hsh admin 96 10 14 16:27 .. drwxr-xr-x 12 hsh admin 384 10 15 14:12 .git -
执行
git fetch --prune origin：执行结果：
remote: Enumerating objects: 3, done. remote: Counting objects: 100% (2/2), done. remote: Total 3 (delta 2), reused 2 (delta 2), pack-reused 1 Unpacking objects: 100% (3/3), 1.54 KiB | 92.00 KiB/s, done. From https://github.com/Homebrew/homebrew-core * [new branch] update-tflint.rb-1634223541 -> origin/update-tflint.rb-1634223541 -
执行
git pull --rebase origin master：执行结果：
From https://github.com/Homebrew/homebrew-core * branch master -> FETCH_HEAD -
成功后即可执行更新：
brew update：执行结果：
Already up-to-date. -
之后便可正常执行其他命令了
eg：
brew install rbenv ruby-build；
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安装或更新
brew报错：fatal: unable to access ‘https://github.com/Homebrew/brew/’: LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443解决方法：
需要翻墙：
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查看网络设置里当前网络socks代理服务器的IP和端口号，如下截图：
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添加git全局配置；
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可以在终端先运行如下命令查看当前git配置：
cat ~/.gitconfig，看是否有如下两项配置：http.proxy=socks5://127.0.0.1:6666 http.sslbackend=openssl -
如果没有，在终端分别运行如下两条命令添加配置：
git config --global http.sslBackend "openssl" // 端口号请使用自己本地socks端口号 git config --global http.proxy "socks5://127.0.0.1:1189" -
这时再查看gitconfig的配置，就有如下截图中的配置项了：
[http] sslBackend = openssl proxy = socks5://127.0.0.1:1080
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修改：
hosts文件：路径在：/private/etc/hosts：添加：140.82.114.4 github.com 185.199.108.133 raw.githubusercontent.com 185.199.109.133 raw.githubusercontent.com 185.199.110.133 raw.githubusercontent.com 185.199.111.133 raw.githubusercontent.com 此时重新回去执行安装brew的命令就可以成功安装
brew软件了；如果之前安装失败过，此时再安装可能会遇到错误，需要先卸载再安装；
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安装成功以后想撤销刚刚对gitconfig的配置，在终端运行如下命令：
git config --global --unset http.sslBackend git config --global --unset http.proxy
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报错：
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to raw.githubusercontent.com:443 或者 fatal: unable to access github.com/Homebrew/br…: LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443解决方案：查询资料后发现苹果新系统安全提升，禁止了直接执行远程脚本。 把脚本文件下载到本地来执行就好：
将对应的脚本文件下载以后，在终端切换到下载脚本所在目录并执行
bash install.sh/bash uninstall.sh进行安装/卸载；
