How can I solve "The repository 'cdrom://Ubuntu 20.04.2.0 LTS _Focal Fossa_ - Release amd64 (20210209.1) focal Release' does not have a Release file"?

Question

$ sudo apt update
E: The repository 'cdrom://Ubuntu 20.04.2.0 LTS _Focal Fossa_ - Release amd64 (20210209.1) 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.

Does this answer your question? Problem with sudo apt get update: The repository cdrom... does not have a Release file — N0rbert, May 18 '21 at 06:48

score 5 · Accepted Answer · answered May 18 '21 at 07:17

5

Open Software & Updates, in the Ubuntu Software tab, uncheck Cdrom with Ubuntu 20.04 'Focal Fossa' under Installable from CD-ROM/DVD

answered May 18 '21 at 07:17

Edmund

727

How can I solve "The repository 'cdrom://Ubuntu 20.04.2.0 LTS _Focal Fossa_ - Release amd64 (20210209.1) focal Release' does not have a Release file"?

1 Answers1