[Nodejs] npm install이 ERR! EACCESS(권한 문제)로 설치되지 않을 때

🚫 npm install이 안 되는 경우

Vue.js 프로젝트를 시작하기 앞서 node를 이용해 Mac에 lite-server를 설치하려는데 아래와 같은 에러가 발생하며 설치가 되지 않았다.

suyeonglee ► ~ ► npm install -g lite-server
npm notice
npm notice New minor version of npm available! 8.5.5 -> 8.8.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v8.8.0
npm notice Run npm install -g npm@8.8.0 to update!
npm notice
npm ERR! code EACCES
npm ERR! syscall mkdir
npm ERR! path /usr/local/lib/node_modules/lite-server
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/lite-server'
npm ERR!  [Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/lite-server'] {
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: '/usr/local/lib/node_modules/lite-server'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/suyeonglee/.npm/_logs/2022-04-28T13_13_06_240Z-debug-0.log

첫 줄의 -g 전역 설치 옵션 때문에 생긴 권한 에러였다. 이 경우 간단하게 해결할 수 있다.

✅ 관리자 권한으로 설치하기

npm install 앞에 sudo를 붙여 관리자 권한으로 설치하면 문제 해결~! Password는 Mac의 비밀번호를 입력하면 된다.

# 명령어
sudo npm install -g lite-server

# 실제 로그
 ✘ suyeonglee ► ~ ► sudo npm install -g lite-server
Password:

added 174 packages, and audited 175 packages in 9s

6 packages are looking for funding
  run `npm fund` for details

3 high severity vulnerabilities

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.