NPM command prompt error: eacces: permission denied

Not enough permissions , Appear in the npm Upgrade time ,
It is easier to execute commands using the following methods ,
Add before all commands sudo
for example :
npm install -g npm
Turn into
sudo npm install -g npm
Prompt for password , Enter the password as required

Reference link :

1. Error: EACCES: permission denied, access ‘/usr/local/lib/node_modules’