Cannot install #angular/cli on Linux - node.js

Question

When I execute command: npm install -g #angular/cli I get an error:
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! path /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! { Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/local/lib/node_modules' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/my_user_name/.npm/_logs/2017-07-13T13_36_06_285Z-debug.log
And then I tried to execute command: sudo npm install -g #angular/cli but I got an error:
npm ERR! path /usr/local/bin/ng
npm ERR! code EEXIST
npm ERR! Refusing to delete /usr/local/bin/ng: ../lib/node_modules/angular-cli/bin/ng symlink target is not controlled by npm /usr/local/bin
npm ERR! File exists: /usr/local/bin/ng
npm ERR! Move it away, and try again.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/my_user_name/.npm/_logs/2017-07-13T13_39_01_642Z-debug.log
How can I install Angular-CLI if even sudo priviliges are not sufficient?

Answer 1

It looks like a write issue.
You have two options to use sudo (not the best option) or change the folder owner.
sudo npm install -g #angular/cli
sudo chown -R $USER /usr/local/lib/node_modules
Check content symlink path eventually reinstall duplicity a set rights.