On Ubuntu Lucid, you can use a PPA (personal package archive), which are package sources hosted on 런치패드. The one most commonly used by Evergreen Community members is maintained by Martin Pitt, who also maintains the official PostgreSQL packages for Ubuntu. As the root Linux account, issue the following commands to add the PPA source:

apt-get install python-software-properties
add-apt-repository ppa:pitti/postgresql


프로그램 설치 전에 저 과정을 먼저 거쳐야 한다는거 같은데, PPA source가 뭘 말하는거에요??그냥 텍스트 에디터같은걸로 열어서 저걸 집어넣어야 할거같은데 어디 넣어야 하는지를 모르겠어요...