Debian 8.5 setup.

add to favoriets= terminal.

1. prepare location /mnt/ to copy and store repository.
su; chmod a+rwx /mnt/;
mkdir /mnt/01/ /mnt/02/ /mnt/03/ /mnt/04/ /mnt/05/ /mnt/06/ /mnt/07/ /mnt/08/ /mnt/09/ /mnt/10/ /mnt/11/ /mnt/12/ /mnt/13/;

2. copy repository from dvd to /mnt/.
Use gui eject command to eject cd. Do not push physical eject button. Do not use bash eject command.
cp -r -T /media/cdrom0/ /mnt/01/;
cp -r -T /media/cdrom0/ /mnt/02/;
cp -r -T /media/cdrom0/ /mnt/03/;
cp -r -T /media/cdrom0/ /mnt/04/;
cp -r -T /media/cdrom0/ /mnt/05/;
cp -r -T /media/cdrom0/ /mnt/06/;
cp -r -T /media/cdrom0/ /mnt/07/;
cp -r -T /media/cdrom0/ /mnt/08/;
cp -r -T /media/cdrom0/ /mnt/09/;
cp -r -T /media/cdrom0/ /mnt/10/;
cp -r -T /media/cdrom0/ /mnt/11/;
cp -r -T /media/cdrom0/ /mnt/12/;
cp -r -T /media/cdrom0/ /mnt/13/;

3. Tell system where repository is.
su; chmod a+rwx /etc/apt/sources.list;
copy and paste this data.
deb file:/mnt/01/ jessie main contrib
deb file:/mnt/02/ jessie main contrib
deb file:/mnt/03/ jessie main contrib
deb file:/mnt/04/ jessie main contrib
deb file:/mnt/05/ jessie main contrib
deb file:/mnt/06/ jessie main contrib
deb file:/mnt/07/ jessie main contrib
deb file:/mnt/08/ jessie main contrib
deb file:/mnt/09/ jessie main contrib
deb file:/mnt/10/ jessie main contrib
deb file:/mnt/11/ jessie main contrib
deb file:/mnt/12/ jessie main contrib
deb file:/mnt/13/ jessie main contrib
su; aptitude update;

5. copy /mnt/ from this system to another system.
su; chmod a+rwx /media/r/dbb9214e-3161-4596-8225-1ac0d60d9f93/mnt/;
cp -r /mnt/ /media/r/dbb9214e-3161-4596-8225-1ac0d60d9f93/;