Linux 无法在Ubuntu上安装appium

我试图在ubuntu上安装appium，但它显示了以下错误。请帮忙

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!   stack: '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/anubhavjain/.npm/_logs/2018-02-16T18_51_42_881Z-debug.log

---

错误消息“请尝试以root/Administrator身份再次运行此命令。”可能包含答案。请尝试以下操作：

sudo npm install-g appium

阅读其中的内容如何？说真的，它甚至给了你一个提示，什么是错的！

2018-02-16T18_51_42_881Z-debug.log

说什么？我是ubuntu新手，你能告诉我命令吗。