Npm err! your cache folder contains root-owned files, due to a bug in npm err! previous versions of npm which has since been addressed.

Explanation:

When you encounter the error message “npm err! your cache folder contains root-owned files, due to a bug in npm err! previous versions of npm which has since been addressed.”, it means that there are files in your npm cache folder that are owned by the root user.

This error usually occurs when you have installed packages using sudo or as the root user, which leads to the cache files being owned by root and causing permission issues when npm tries to access them.

Example:

Let’s assume you have encountered this error and need to fix it.

1. First, find the path to your npm cache folder by running the following command in your terminal:

npm config get cache

It will return the path to your npm cache folder, something like “/home/username/.npm”.

2. Next, navigate to the npm cache folder by running the following command:

cd /home/username/.npm

Replace “/home/username/.npm” with the actual path to your npm cache folder.

3. List the files in the cache folder to see if there are any root-owned files:

ls -la

This will display a list of files and their ownership. Look for any files or directories owned by root.

4. If you find any root-owned files or directories, change their ownership to your user by running the following command:

sudo chown -R username:groupname file/directory

Replace “username” and “groupname” with your actual username and groupname, and replace “file/directory” with the actual root-owned file or directory.

5. Once you have changed the ownership of the root-owned files, you can try running your npm commands again. The error should be resolved.