# n모듈 설치
$ npm install -g n

# node 안정버전 설치
$ n stable

# 노드버전 확인
$ node -v
v11.10.0 

# lts버전 설치
$ n lts

# 특정버전 설치 ex> $ n <version> 
$ n 10.0.0

# 버전삭제 
$ n rm 10.0.0

//npm 버전 확인
$ npm -v
3.1.0

$ sudo npm install -g npm
/usr/local/bin/npm -> /usr/local/lib/node_modules/npm/bin/npm-cli.js
/usr/local/bin/npx -> /usr/local/lib/node_modules/npm/bin/npx-cli.js
+ npm@6.8.0
added 2 packages from 2 contributors, removed 2 packages and updated 7 packages in 20.345s

$npm -v
3.10.0