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error while installing angular/cli

npm WARN optional Skipping failed optional dependency /@angular/cli/chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.2.4
npm ERR! Linux 4.15.0-29-generic
npm ERR! argv “/usr/bin/node” “/usr/bin/npm” “install” “-g” “@angular/cli”
npm ERR! node v8.10.0
npm ERR! npm v3.5.2
npm ERR! path /usr/local/lib
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access

npm ERR! Error: EACCES: permission denied, access ‘/usr/local/lib’
npm ERR! { Error: EACCES: permission denied, access ‘/usr/local/lib’
npm ERR! errno: -13,
npm ERR! code: ‘EACCES’,
npm ERR! syscall: ‘access’,
npm ERR! path: ‘/usr/local/lib’ }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! Please include the following file with any support request:
npm ERR! /home/adminfinatel/npm-debug.log


is this related?