在ubuntu中安装npm软件包时发生错误

Question

我正在尝试在Ubuntu 18中安装NPM软件包。但是每次显示root管理员错误。看看我得到的错误。

npm ERR! Linux 4.15.0-46-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/ujjwal/npm-debug.log