npm doctor

Check the health of the npm environment. More information: https://docs.npmjs.com/cli/commands/npm-doctor.

• Run all default health checks for npm:

npm doctor

• Check the connection to the npm registry:

npm doctor connection

• Check the versions of Node.js and npm in use:

npm doctor versions

• Check for permissions issues with npm directories and cache:

npm doctor permissions

• Validate the cached package files and checksums:

npm doctor cache