lerna: command not found error [Solved]

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Borislav Hadzhiev

Last updated: Mar 21, 2022

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lerna: command not found error [Solved] #

Use npx to solve the error "lerna: command not found", e.g. npx lerna --version or install the package globally by running npm install -g lerna to be able to use the command without the npx prefix.

command not found lerna

The fastest way to solve the error is to use the npx command.

shell
npx lerna --version

You can prefix any lerna command with npx to be able to run it from any directory.

Alternatively, you can install lerna globally.

shell
# 👇️ installs lerna globally npm install -g lerna lerna --version

If the second command outputs a version number, then lerna is installed successfully.

If the global installation of lerna fails, you might have to run the command prefixed with sudo.
shell
# 👇️ if you get permissions error sudo npm install -g lerna lerna --version
If the "lerna: command not found" error is not resolved, try restarting your terminal.

If that doesn't help, run the following command:

shell
npm config get prefix

The command will show you the path where npm puts your globally installed packages. The global packages will be in the bin directory at the specified path.

Look at the PATH environment variable on your operating system and add the path that the npm config get prefix command outputs if it's not already there.

If you add the output from the command to your PATH environment variable, you have to restart any open command prompts before it takes effect.

If that didn't work, try to add the path to the bin folder (from npm config get prefix) to your PATH environment variable and restart your terminal.

For example, on macOS, you can update your path with the following command:

shell
# make sure path matches with npm config get prefix export PATH=/usr/local/share/npm/bin:$PATH

And on Windows, the output of the npm config get prefix command will look something like: C:\Users\Your_User_Name\AppData\Roaming\npm.

Edit the environment variable on your machine and add the specified path (replacing the placeholder with your username).

If you are on Linux, you can add the output from the npm config get prefix command to your .bashrc file.

~/.bashrc
# 👇️ make sure to update the path with the output # from the command export PATH="/usr/local/share/npm/bin:$PATH"
If you add the output from the command to your PATH environment variable, you have to restart any open command prompts before it takes effect.

If that doesn't help try to reinstall Node.js on your machine and then install lerna globally by running npm install -g lerna.

During the installation, you might get a prompt for whether you want to automatically update the PATH environment variable on your system, make sure to tick the option.
shell
npm install -g lerna lerna --version
If the global installation of lerna fails, you might have to run the command prefixed with sudo.
shell
# 👇️ if you get permissions error sudo npm install -g lerna lerna --version

Alternatively, you can see how you can fix the permissions error on this page in the official npm docs.

Conclusion #

Use npx to solve the error "lerna: command not found", e.g. npx lerna --version or install the package globally by running npm install -g lerna to be able to use the command without the npx prefix.

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