brew 安装配置
一.安装
1.在 ubuntu 上安装 brew
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 |     /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
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2.在 centos 上安装 brew
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 |     /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
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3.在 MacOS 上安装 brew
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 |     /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
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二、使用
1.安装 wget
Homebrew 会将软件包安装到独立目录,并将其文件软链接至 /usr/local
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 |     $ cd /usr/local
    $ find Cellar
    Cellar/wget/1.16.1
    Cellar/wget/1.16.1/bin/wget
    Cellar/wget/1.16.1/share/man/man1/wget.1
    $ ls -l bin
    bin/wget -> ../Cellar/wget/1.16.1/bin/wget
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2.创建你自己的 Homebrew 包
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 |     $ brew create https://foo.com/bar-1.0.tgz
    Created /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/bar.rb
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3.撤销你的变更或与上游更新合并
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 |     $ brew edit wget # 使用 $EDITOR 编辑!
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