====== Shell Check ======
  * https://www.shellcheck.net/ : Shell Script Static Analysis Tool

===== 참고 =====
  * [[http://note.arzhna.net/2017/05/15/shellcheck%EC%9D%84-%EC%8D%A8%EB%9D%BC-%EB%91%90%EB%B2%88-%EC%8D%A8%EB%9D%BC/|쉘 스크립트를 만드는 당신, ShellCheck을 써라!]]