Ubuntu - E: The repository 'cdrom://...' does not have a Release file.
Ubuntu에서 apt update 시 이런 오류가 발생하는군요. ^^;
$ sudo apt-get update
Ign:1 cdrom://Ubuntu 20.04.1 LTS _Focal Fossa_ - Release amd64 (20200731) focal InRelease
Err:2 cdrom://Ubuntu 20.04.1 LTS _Focal Fossa_ - Release amd64 (20200731) focal Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Hit:3 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:5 http://kr.archive.ubuntu.com/ubuntu focal InRelease
Hit:6 http://kr.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://kr.archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
E: The repository 'cdrom://Ubuntu 20.04.1 LTS _Focal Fossa_ - Release amd64 (20200731) focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
6
보니까, "cdrom://..." 프로토콜로 시작하므로 지워도 될 듯합니다. 검색하면, 이 목록을 "/etc/apt/sources.list"에 보관한다는데,
$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 20.04.1 LTS _Focal Fossa_ - Release amd64 (20200731)]/ focal main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://kr.archive.ubuntu.com/ubuntu/ focal main restricted
# deb-src http://kr.archive.ubuntu.com/ubuntu/ focal main restricted
...[생략]...
위와 같이 "deb cdrom:..." 라인을 주석 처리 또는 삭제합니다. 이후 다시 실행하면 잘 동작합니다.
$ sudo apt-get update
Hit:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://kr.archive.ubuntu.com/ubuntu focal InRelease
Hit:3 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:4 http://kr.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:5 http://kr.archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
(잘은 모르겠지만, 아마 오류 메시지를 참을 수 있다면 그냥 둬도 동작 자체에는 문제가 없을 것입니다.)
[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]