Hey there, let's work through why you're hitting that ERROR: [Errno 2] No such file or directory: 'global' when running yarn global add yo (or any other yarn global command). Here are the most common fixes to test out:

1. Check your Yarn version first #

The global command was removed starting with Yarn 2.x (also called Yarn Berry). If you're running a newer Yarn release, this is exactly why you're seeing the error.

• Run this to check your version:

  yarn --version
  

• If the output is 2.x or higher, you have two solid options:
  • Option A: Use Yarn's modern alternatives
    To run a package temporarily without global installation, use yarn dlx:

    yarn dlx yo
    

    If you really need a persistent global install, switch to npm for this task:

    npm install -g yo
    

  • Option B: Downgrade to Yarn Classic (1.x)
    If you prefer sticking with the yarn global workflow, revert to the classic version:

    npm install -g yarn@classic
    

2. Verify your global Yarn installation (for Yarn Classic) #

If you're already on Yarn 1.x but still getting the error, there might be an issue with how Yarn is installed globally:

• First, confirm you're running the global Yarn executable (not a local project-specific one):
  • On macOS/Linux:

    which yarn
    

    The output should point to a path like ~/.yarn/bin/yarn or /usr/local/bin/yarn.
  • On Windows:

    where yarn
    

    Look for a path in your system's Program Files or AppData directory.
• If the path points to a local project's node_modules/.bin/yarn, either run commands with the full path to your global Yarn, or ensure your global Yarn's bin directory is in your system's PATH.
• If the installation seems corrupted, reinstall Yarn Classic:

  npm uninstall -g yarn
  npm install -g yarn@classic
  

3. Check your system's PATH environment variable #

Sometimes the error pops up because Yarn's global bin directory isn't in your PATH, so your shell can't resolve the global command context:

• On macOS/Linux:
  • Check if ~/.yarn/bin is in your PATH:

    echo $PATH
    

  • If it's missing, add it to your shell config file (like ~/.bashrc, ~/.zshrc):

    export PATH="$HOME/.yarn/bin:$PATH"
    

  • Reload the config file to apply changes:

    source ~/.zshrc  # or source ~/.bashrc depending on your shell
    

• On Windows:
  • Open System Properties → Advanced → Environment Variables.
  • Under "System Variables", find the PATH entry and edit it.
  • Add the path to Yarn's global bin directory (usually C:\Users\YourUsername\AppData\Roaming\Yarn\bin).
  • Restart your command prompt or PowerShell for changes to take effect.

After trying these steps, run yarn global add yo again—it should work as expected!

内容的提问来源于stack exchange，提问作者smaug