You're encountering a network-related ENOTFOUND error when running npm install grunt-cli, likely due to proxy or DNS configuration issues.

1. Check Proxy Configuration If you're behind a corporate proxy or firewall, you must configure npm to use it:

npm config set proxy http://username:password@proxy-server:port npm config set https-proxy http://username:password@proxy-server:port

If no proxy is used, clear any lingering settings:

npm config delete proxy npm config delete https-proxy

Then check:

npm config list

2. Use HTTPS Registry Instead of HTTP

Your error shows an attempt to access registry.npmjs.org:80 (HTTP). Force npm to use HTTPS:

npm config set registry https://registry.npmjs.org/

3. Flush DNS Cache (Windows) Sometimes DNS issues cause ENOTFOUND errors. Try flushing DNS:

ipconfig /flushdns

4. Use Google DNS Update your DNS settings to use Google’s public DNS: -Preferred DNS: 8.8.8.8 -Alternate DNS: 8.8.4.4

5. Clear npm Cache

npm cache clean –force

6. Upgrade npm and Node (Optional but Recommended) You're using: -Node v4.4.4 -npm v2.15.1

These are very outdated and may have issues with current registry URLs and HTTPS handling.

Test It

npm install grunt-cli -g