debian 8.5.0 jessie takes 13 dvd.

Create target directory structure. #[code]
mkdir -p /os/debian/8.5.0/amd64/DVD/iso /os/debian/8.5.0/amd64/DVD/extract/01 /os/debian/8.5.0/amd64/DVD/extract/02 /os/debian/8.5.0/amd64/DVD/extract/03 /os/debian/8.5.0/amd64/DVD/extract/04 /os/debian/8.5.0/amd64/DVD/extract/05 /os/debian/8.5.0/amd64/DVD/extract/06 /os/debian/8.5.0/amd64/DVD/extract/07 /os/debian/8.5.0/amd64/DVD/extract/08 /os/debian/8.5.0/amd64/DVD/extract/09 /os/debian/8.5.0/amd64/DVD/extract/10 /os/debian/8.5.0/amd64/DVD/extract/11 /os/debian/8.5.0/amd64/DVD/extract/12 /os/debian/8.5.0/amd64/DVD/extract/13
chmod -R a+rwx /os/debian/8.5.0 /etc/fstab /etc/apt/sources.list
exit[/code]

copy software repository to iso file in the path that was created above.

Copy and paste this into the bottom of /etc/fstab.[code]
/os/debian/8.5.0/amd64/DVD/iso/01.iso /os/debian/8.5.0/amd64/DVD/extract/01/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/02.iso /os/debian/8.5.0/amd64/DVD/extract/02/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/03.iso /os/debian/8.5.0/amd64/DVD/extract/03/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/04.iso /os/debian/8.5.0/amd64/DVD/extract/04/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/05.iso /os/debian/8.5.0/amd64/DVD/extract/05/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/06.iso /os/debian/8.5.0/amd64/DVD/extract/06/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/07.iso /os/debian/8.5.0/amd64/DVD/extract/07/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/08.iso /os/debian/8.5.0/amd64/DVD/extract/08/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/09.iso /os/debian/8.5.0/amd64/DVD/extract/09/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/10.iso /os/debian/8.5.0/amd64/DVD/extract/10/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/11.iso /os/debian/8.5.0/amd64/DVD/extract/11/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/12.iso /os/debian/8.5.0/amd64/DVD/extract/12/ udf,iso9660 loop 0 0
/os/debian/8.5.0/amd64/DVD/iso/13.iso /os/debian/8.5.0/amd64/DVD/extract/13/ udf,iso9660 loop 0 0

[/code]

Copy this, open /etc/apt/sources.list with gedit text editor, and paste this into all of /etc/apt/sources.list. [code]
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/01/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/02/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/03/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/04/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/05/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/06/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/07/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/08/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/09/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/10/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/11/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/12/ jessie main contrib
deb [ arch=amd64 trusted=yes allow-insecure=yes ] file:/os/debian/8.5.0/amd64/DVD/extract/13/ jessie main contrib

[/code]

Mount all filesystems mentioned in fstab. As directed in /etc/fstab, extract from /os/debian/8.5.0/amd64/DVD/iso/01.iso/*.iso into /os/debian/8.5.0/amd64/DVD/extract/*/. Tell system about new repository.
#[code]mount -a
apt-get update
exit[/code]
mount: /dev/loop0 is write-protected, mounting read-only