最近brew doctor或brew upgrade --all（我不确定哪个，我在脚本中运行它们）报告了以下内容：
Homebrew from 5371359 to e3fe270.
Updated 3 taps (caskroom/cask, homebrew/boneyard, homebrew/core).
Error: Could not symlink bin/dvipdf
Target /usr/local/bin/dvipdf
already exists. You may want to remove it:
rm '/usr/local/bin/dvipdf'
To force the link and overwrite all conflicting files:
brew link --overwrite ghostscript
To list all files that would be deleted:
brew link --overwrite --dry-run ghostscript
Error: Could not symlink bin/easy_install
Target /usr/local/bin/easy_install
already exists. You may want to remove it:
rm '/usr/local/bin/easy_install'
To force the link and overwrite all conflicting files:
brew link --overwrite python
To list all files that would be deleted:
brew link --overwrite --dry-run python:
我按照以下说明运行：
brew link --overwrite python
brew link --overwrite ghostscript
但是现在每当我运行brew doctor时获取：
Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
# A list of EVERYTHING listed by brew list
即：brew doctor现在显示我已安装的所有内容 - brew list列出的所有内容 - 取消链接！
这里发生了什么？为什么我用Homebrew安装的所有内容突然断开连接？他们是怎么做到的？我可以（安全地）做些什么来修复我的Homebrew安装（除了在我安装的每件东西上单独手动运行brew link --overwrite ...之外？
答案 0 :(得分：4)
运行brew update（必要时两次）应该对此进行排序。
如果没有，brew unlink $(brew list); brew link $(brew list)会。