不知道为什么没有人提到这一点:当你从官方网站运行安装命令时，在最后几行你会看到如下内容，你需要遵循==>下一步:

==> Installation successful!

==> Homebrew has enabled anonymous aggregate formulae and cask analytics.
Read the analytics documentation (and how to opt-out) here:
  https://docs.brew.sh/Analytics
No analytics data has been sent yet (or will be during this `install` run).

==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
  https://github.com/Homebrew/brew#donations

==> Next steps:
- Add Homebrew to your PATH in /Users/{YOUR USER NAME}/.bash_profile:
    echo 'eval $(/opt/homebrew/bin/brew shellenv)' >> /Users/{YOUR USER NAME}/.bash_profile
    eval $(/opt/homebrew/bin/brew shellenv)

这是bash shell的。对于每个不同的shell，您将看到不同的步骤，但是这些步骤的源是相同的。

解决“-bash: brew:命令未找到”问题

将Homebrew添加到/Users//.bash_profile中的PATH:

echo 'eval $(/opt/homebrew/bin/brew shellenv)' >> /Users//.bash_profile . sh

eval $(/opt/homebrew/bin/brew shellenv)

下面是一个将自制程序安装程序包装在bash函数中的版本，可以从部署脚本中运行:

install_homebrew_if_not_present() {
    echo "Checking for homebrew installation"
    which -s brew
    if [[ $? != 0 ]] ; then
        echo "Homebrew not found. Installing..."
        ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
    else
        echo "Homebrew already installed! Updating..."
        brew update
    fi
}

另一个函数将安装一个自制公式，如果它还没有安装:

brew_install () {       
    if brew ls --versions $1 > /dev/null; then
        echo "already installed: $1"
    else
        echo "Installing forumula: $1..."
        brew install $1
    fi
}

一旦你定义了这些函数，你可以在你的bash脚本中像下面这样使用它们:

install_homebrew_if_not_present
brew_install wget
brew_install openssl
...

在终端中添加以下内容，单击“enter”，然后按照终端中的说明操作。/usr/bin/ruby -e "$(curl - ssl https://raw.githubusercontent.com/Homebrew/install/master/install)"

如果你使用的是m1芯片mac，那么在安装homebrew后运行以下命令并再次打开终端:

echo "export PATH=/opt/homebrew/bin:$PATH" >> ~/.zshrc

我可能迟到了，但是有一个很酷的网站，你可以在那里搜索软件包，它会列出安装这些东西的必要命令。 BrewInstall是网站。

但是你可以用下面的命令安装wget:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install wget

希望这对你有所帮助。