Add a new CD or DVD to apt’s list of available sources. The database of CD-ROM IDs that apt maintains is /var/lib/apt/cdroms.list.
Add a disk to the source list.
Print the identity of the current disk and the stored filename. Used for debugging.
Do a thorough package scan. May be needed with some old Debian CDs to find all package locations.
Specify a configuration file to be read after the default configuration file.
Specify the CD-ROM mount point, which must be listed in /etc/fstab. The configuration option is Acquire::cdrom::mount.
Do a fast copy, assuming the files are valid and don’t all need checking. Specify this only if the disk has been run before without error. The configuration option is APT::CDROM::Fast.
Print help message and exit.
Don’t mount or unmount the mount point. The configuration option is APT::CDROM::NoMount.
Check everything, but don’t actually make any changes. The configuration option is APT::CDROM::NoAct.
Set a configuration option. Syntax is -o group::tool=option.
Prompt for a new label and rename the disk to the new value. The configuration option is APT::CDROM::Rename.
Print the version information and exit.