I’m on Debian 12, KDE Plasma, I often get this error
E: The repository ‘cdrom://[Debian GNU/Linux 12.0.0 Bookworm - Official amd64 DVD Binary-1 with firmware 20230610-10:23] bookworm Release’ does not have a Release file. W: Updating from such a repository can’t be done securely, and is therefore disabled by default. W: See apt-secure(8) manpage for repository creation and user configuration details. E: cdrom://[Debian GNU/Linux 12.0.0 Bookworm - Official amd64 DVD Binary-1 with firmware 20230610-10:23] bookworm Release is not (yet) available (Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs) W: http://dl.google.com/linux/earth/deb/dists/stable/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
I didn’t install from a CD Rom or DVD, what is the problem here?
To add to what @lordnikon said, the program is called Software & Updates and I’m pretty sure it’s installed by default in GNOME (don’t know about other DEs).
Cheers! Yes it’s the same as in KDE. The command-line call is
software-properties-gtkorsoftware-properties-kde.