when you don't have a problem with internet but can't get install using apt-get... you'd better edit the source.listerror message likes... E: unable to locate package ~~~~ in case of Republic of korea i tried this in Ubuntu and Debian 1. edit the sources.list# vim /etc/apt/sources.list origin things -->commented using #기존것들은 다 #로 주석처리해주시고 아래 이탤릭체를 넣어주세요 (daum이 젤조아여...bb) debian OS의 wheezy 배포판 사용..