Dificuldades na instalação do react-native-cli

richeinz@richeinz-PC:~$ npm install -g react-native-cli
npm WARN checkPermissions Missing write access to /usr/lib/node_modules
npm ERR! path /usr/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/lib/node_modules'
npm ERR! { Error: EACCES: permission denied, access '/usr/lib/node_modules'
npm ERR! stack: 'Error: EACCES: permission denied, access \'/usr/lib/node_modules\'',
npm ERR! errno: -13,
npm ERR! code: 'EACCES',
npm ERR! syscall: 'access',
npm ERR! path: '/usr/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/richeinz/.npm/_logs/2018-10-17T01_13_42_280Z-debug.log