Professor quando tento dar o comando

sudo nodejs server

no me SO ubuntu 16.04, ele da o seguinte erro

DEPRECATED use https://github.com/pillarjs/path-to-regexp
module.js:328
    throw err;
    ^

Error: Cannot find module 'body-parser'
    at Function.Module._resolveFilename (module.js:326:15)
    at Function.Module._load (module.js:277:25)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/home/erick/Documentos/node_exemplos/alurapic/config/express.js:3:19)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)

Esqueci de instalar as depedências!!