doschk software package provides SYSV and DOS filename conflicts check, 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 doschk
doschk is installed in your system.
Make ensure the doschk package were installed using the commands given below,
$ sudo dpkg-query -l | grep doschk *
You will get with doschk package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | doschk |
| Version | 1.1-6+b1 [armhf], 1.1-6 [amd64 |
| Description | SYSV and DOS filename conflicts check |
| Sub Section | Utils |