deb http://ftp.daumkakao.com/ubuntu/ bionic main
deb http://kr.archive.ubuntu.com/ubuntu/ bionic-updates main

deb http://ftp.daumkakao.com/ubuntu/ bionic universe
deb http://kr.archive.ubuntu.com/ubuntu/ bionic-updates universe

deb http://ftp.daumkakao.com/ubuntu/ bionic multiverse
deb http://kr.archive.ubuntu.com/ubuntu/ bionic-updates multiverse

deb http://ftp.daumkakao.com/ubuntu/ bionic restricted
deb http://kr.archive.ubuntu.com/ubuntu/ bionic-updates restricted