On Thu 15 Jun 2023 at 21:32:41 (+0000), Totoro wrote: > After entering > > sudo apt update > > The following messages appeared on the console: > > Ign:1 cdrom://[Debian GNU/Linux 12.0.0 _Bookworm_ - Official amd64 DVD > Binary-1 with firmware 20230610-10:23"] bookworm InRelease > Err:2 cdrom://[Debian GNU/Linux 12.0.0 _Bookworm_ - Official amd64 DVD > Binary-1 with firmware 20230610-10:23"] bookworm Release > Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update > cannot be used to add new CD-ROMs. > Reading package lists.....Done > > 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. > 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. > > I have read the manpages of both 'apt-cdrom' and 'apt-secure' and they only > contain lists and descriptions of options and parameters. They do not contain > examples on how to use the options. > > My objective is to mount the flash drive as a CD-ROM and use it to install > additional software.
It looks as though you haven't added an entry in /etc/apt/sources.list (or a file in its directory) for reading from the mounted stick. Something like: deb file:/mnt/mount-iso bookworm main non-free contrib non-free-firmware See man sources.list Cheers, David.
