tar -czvf archive.tar.gz directory
tar -xvzf archive.tar.gz
mysqldump -u userid -p userid > dbfile.sql
du -sh
http://cafe.naver.com/crazysystem.cafe?iframe_url=/ArticleRead.nhn%3Farticleid=194
http://www.superuser.co.kr/superuserboard/view.html?id=35&code=linuxcom&start=50&position