[Linux] Pipe, Filter, Redirection

Link : http://rockdrumy.tistory.com/entry/Fedora-%ED%8C%8C%EC%9D%B4%ED%94%84-%ED%95%84%ED%84%B0-%EB%A6%AC%EB%8B%A4%EC%9D%B4%EB%A0%89%EC%85%98