dvdbackup software package provides tool to rip DVDs from the command line, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dvdbackup
dvdbackup is installed in your system.
Make ensure the dvdbackup package were installed using the commands given below,
$ sudo dpkg-query -l | grep dvdbackup *
You will get with dvdbackup package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Video |
| Package | dvdbackup |
| Version | 0.4.2-4 |
| Description | tool to rip DVDs from the command line |
| Sub Section | Video |