npm install angular error ubuntu

Question

Helloo, am starting to learn angular and while trying to install angular by npm install angular on ubuntu 16.04LTS am getting the following error:

npm ERR! Linux 4.4.0-64-generic
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "install" "angular"
npm ERR! node v4.2.6
npm ERR! npm  v3.5.2
npm ERR! code EAI_AGAIN
npm ERR! errno EAI_AGAIN
npm ERR! syscall getaddrinfo
npm ERR! getaddrinfo EAI_AGAIN registry.npmjs.org:443
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>
npm ERR! Please include the following file with any support request:
npm ERR!     /home/hillux/npm-debug.log

some help will be appreciated guys.

Answer 1

Enter command in terminal

npm cache clean

chmod -R 777 directory where u installing npm eg:(chmod -R 777 /root/mydesktop)

npm install