diff --git a/help/_posts/1970-01-01-homebrew.md b/help/_posts/1970-01-01-homebrew.md
index be5ff31..6380ffe 100644
--- a/help/_posts/1970-01-01-homebrew.md
+++ b/help/_posts/1970-01-01-homebrew.md
@@ -8,100 +8,104 @@ mirrorid: homebrew
 
 **注:该镜像是 Homebrew/Linuxbrew 的 formula 索引的镜像（即 `brew update` 时所更新内容）。本镜像站同时提供相应的二进制预编译包的镜像，请参考 [Homebrew bottles 镜像使用帮助](https://{{ site.hostname }}/help/homebrew-bottles/) 和 [Linuxbrew bottles 镜像使用帮助](https://{{ site.hostname }}/help/linuxbrew-bottles/)。**
 
-### 首次安装 Homebrew
+### 首次安装 Homebrew / Linuxbrew
 
-首先，下载安装脚本的镜像（也可以直接从官方下载，即 `https://raw.githubusercontent.com/Homebrew/install/master/install.sh` ）：
+首先，需要确保系统中安装了 git 和 curl。其中 macOS 系统自带，而 Linux 用户安装 git 即可 (curl 为 git 的依赖项会自动安装)。
+
+接着，在终端输入以下两行命令设置环境变量：
 
 ```bash
-git clone https://{{ site.hostname }}/git/homebrew/install.git
-cd install
+# macOS 用户，请使用以下两句命令
+export HOMEBREW_CORE_GIT_REMOTE="https://{{ site.hostname }}/git/homebrew/homebrew-core.git"
+export HOMEBREW_BOTTLE_DOMAIN="https://{{ site.hostname }}/homebrew-bottles"
+# Linux 用户，请使用以下两句命令
+# export HOMEBREW_CORE_GIT_REMOTE="https://{{ site.hostname }}/git/homebrew/linuxbrew-core.git"
+# export HOMEBREW_BOTTLE_DOMAIN="https://{{ site.hostname }}/linuxbrew-bottles"
 ```
 
-并编辑其中的 `install.sh`：
+最后，在终端运行以下命令以安装 Homebrew/Linuxbrew：
 
 ```bash
-BREW_REPO="https://github.com/Homebrew/brew"
-# 改成：
-BREW_REPO="https://{{ site.hostname }}/git/homebrew/brew.git"
-```
-
-接着，运行 `install.sh` 以安装 Homebrew：
-
-```bash
-# brew 运行时会从 Homebrew bottles 中拉取一个包
-export HOMEBREW_BOTTLE_DOMAIN=https://{{ site.hostname }}/homebrew-bottles
-# 如果是 Linux 用户，请使用以下这句命令
-# export HOMEBREW_BOTTLE_DOMAIN=https://{{ site.hostname }}/linuxbrew-bottles
-export HOMEBREW_CORE_GIT_REMOTE=https://{{ site.hostname }}/git/homebrew/homebrew-core.git
-bash install.sh
+# 获取并修改安装脚本中的仓库源，运行以安装 Homebrew/Linuxbrew
+/bin/bash -c "$(
+	curl -fsSL https://github.com/Homebrew/install/raw/master/install.sh |
+	sed 's|^BREW_REPO=.*$|BREW_REPO="https://{{ site.hostname }}/git/homebrew/brew.git"|g'
+)"
 ```
 
 这样在首次安装的时候也可以使用镜像。
 
-### 替换现有上游
+_* Linux 用户需要注意，安装 Linuxbrew 后请将相关路径加入自己的环境变量中：_
 
 ```bash
-# brew 程序本身，Homebrew/Linuxbrew 相同
-git -C "$(brew --repo)" remote set-url origin https://{{ site.hostname }}/git/homebrew/brew.git
+test -d ~/.linuxbrew && eval "$(~/.linuxbrew/bin/brew shellenv)"
+test -d /home/linuxbrew/.linuxbrew && eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+test -r ~/.bash_profile && echo "eval \"\$($(brew --prefix)/bin/brew shellenv)\"" >>~/.bash_profile
+test -r ~/.profile && echo "eval \"\$($(brew --prefix)/bin/brew shellenv)\"" >>~/.profile
+test -r ~/.zshrc && echo "eval \"\$($(brew --prefix)/bin/brew shellenv)\"" >>~/.zshrc
+```
 
-# 以下针对 mac OS 系统上的 Homebrew
+_参考了 [https://docs.brew.sh/Homebrew-on-Linux](https://docs.brew.sh/Homebrew-on-Linux)。_
+
+### 替换现有仓库上游
+
+替换 brew 程序本身的源，Homebrew/Linuxbrew 相同：
+
+```bash
+git -C "$(brew --repo)" remote set-url origin https://{{ site.hostname }}/git/homebrew/brew.git
+```
+
+以下针对 macOS 系统上的 Homebrew
+```bash
+# 手动设置
 git -C "$(brew --repo homebrew/core)" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-core.git
 git -C "$(brew --repo homebrew/cask)" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-cask.git
 git -C "$(brew --repo homebrew/cask-fonts)" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-cask-fonts.git
 git -C "$(brew --repo homebrew/cask-drivers)" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-cask-drivers.git
 git -C "$(brew --repo homebrew/cask-versions)" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-cask-versions.git
 
-# 以下针对 Linux 系统上的 Linuxbrew
-git -C "$(brew --repo homebrew/core)" remote set-url origin https://{{ site.hostname }}/git/homebrew/linuxbrew-core.git
-
-# 更换后测试工作是否正常
-brew update
+# 或使用下面的几行命令自动设置
+BREW_TAPS="$(brew tap)"
+for tap in core cask{,-fonts,-drivers,-versions}; do
+	if echo "$BREW_TAPS" | grep -qE "^homebrew/${tap}\$"; then
+		# 将已有 tap 的上游设置为 tuna 并设置 auto update (原 auto update 只针对托管在 GitHub 上的上游有效)
+		git -C "$(brew --repo homebrew/${tap})" remote set-url origin https://{{ site.hostname }}/git/homebrew/homebrew-${tap}.git
+		git -C "$(brew --repo homebrew/${tap})" config homebrew.forceautoupdate true
+	else   # 在 tap 缺失时自动安装（如不需要请删除此行和下面一行）
+		brew tap --force-auto-update homebrew/${tap} https://{{ site.hostname }}/git/homebrew/homebrew-${tap}.git
+	fi
+done
 ```
 
-### 复原
+以下针对 Linux 系统上的 Linuxbrew：
+```bash
+git -C "$(brew --repo homebrew/core)" remote set-url origin https://{{ site.hostname }}/git/homebrew/linuxbrew-core.git
+```
 
-_(感谢Snowonion Lee提供说明)_
+更换上游后需重新设置 git 仓库 HEAD：
+```bash
+brew update-reset
+```
+
+### 复原仓库上游
+
+_(感谢 Snowonion Lee 提供说明)_
 
 ```bash
 # brew 程序本身，Homebrew/Linuxbrew 相同
 git -C "$(brew --repo)" remote set-url origin https://github.com/Homebrew/brew.git
 
-# 以下针对 mac OS 系统上的 Homebrew
-git -C "$(brew --repo homebrew/core)" remote set-url origin https://github.com/Homebrew/homebrew-core.git
-git -C "$(brew --repo homebrew/cask)" remote set-url origin https://github.com/Homebrew/homebrew-cask.git
-git -C "$(brew --repo homebrew/cask-fonts)" remote set-url origin https://github.com/Homebrew/homebrew-cask-fonts.git
-git -C "$(brew --repo homebrew/cask-drivers)" remote set-url origin https://github.com/Homebrew/homebrew-cask-drivers.git
-git -C "$(brew --repo homebrew/cask-versions)" remote set-url origin https://github.com/Homebrew/homebrew-cask-versions.git
+# 以下针对 macOS 系统上的 Homebrew
+BREW_TAPS="$(brew tap)"
+for tap in core cask{,-fonts,-drivers,-versions}; do
+	if echo "$BREW_TAPS" | grep -qE "^homebrew/${tap}\$"; then
+		git -C "$(brew --repo homebrew/${tap})" remote set-url origin https://github.com/Homebrew/homebrew-${tap}.git
+	fi
+done
 
 # 以下针对 Linux 系统上的 Linuxbrew
 git -C "$(brew --repo homebrew/core)" remote set-url origin https://github.com/Homebrew/linuxbrew-core.git
 
-# 更换后测试工作是否正常
-brew update
+# 重新设置 git 仓库 HEAD
+brew update-reset
 ```
-
-### 安装 Linuxbrew 时使用 tuna 镜像
-
-#### 使用 Homebrew/install
-
-Linuxbrew/install 现在已经废弃，被合并入 Homebrew/install。故可遵循「首次安装Homebrew」进行操作。
-
-在安装 Linuxbrew 前，需要安装 git。
-
-#### 直接安装 brew
-
-参考了 [https://docs.brew.sh/Homebrew-on-Linux](https://docs.brew.sh/Homebrew-on-Linux)
-
-直接运行以下命令
-
-```bash
-git clone https://{{ site.hostname }}/git/homebrew/brew.git ~/.linuxbrew/Homebrew
-mkdir ~/.linuxbrew/bin
-ln -s ~/.linuxbrew/Homebrew/bin/brew ~/.linuxbrew/bin
-export HOMEBREW_CORE_GIT_REMOTE=https://{{ site.hostname }}/git/homebrew/homebrew-core.git
-export HOMEBREW_BOTTLE_DOMAIN=https://{{ site.hostname }}/linuxbrew-bottles
-eval $(~/.linuxbrew/bin/brew shellenv)
-brew update
-```
-
-需要注意运行后请将相关路径加入自己的环境变量中。