It appears Homebrew is already installed. If your intent is to reinstall you should do the followin

先卸载

首先想要安装的话，就要先把homebrew删除干净，如果没有删除干净，它就会各种报错。。

sudo rm -rf /usr/local/.git

rm -rf Library .git .gitignore bin/brew README.md share/man/man1/brew

rm -rf ~/Library/Caches/Homebrew

然后为了防止还没删干净，最好跑到你的/usr/local/Library里面把能看到的带“brew“的都删了。当然代价可能是失去你以前用brew安装的一些东西23333

作者：焊板狂魔西加加

链接：http://www.zhihu.com/question/35928898/answer/66926256

来源：知乎

著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

再重新安装

来自 https://github.com/Homebrew/linuxbrew
 * [新分支]          master     -> origin/master

HEAD 现在位于 eec5059 Merge branch homebrew/master into linuxbrew/master

Warning: /home/xxxxxxxxxxx/.linuxbrew/bin is not in your PATH.

提示brew不再系统路径

vim

~/.profile

追加

export PATH="$HOME/.linuxbrew/bin:$PATH"
export MANPATH="$HOME/.linuxbrew/share/man:$MANPATH"
export INFOPATH="$HOME/.linuxbrew/share/info:$INFOPATH"

保存退出

使生效

source~/.profile

再查看brew就正常了