gfio software package provides flexible I/O tester - gui frontend, 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 gfio
gfio is installed in your system.
Make ensure the gfio package were installed using the commands given below,
$ sudo dpkg-query -l | grep gfio *
You will get with gfio package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | gfio |
| Version | 2.10-2 |
| Description | flexible I/O tester - gui frontend |
| Sub Section | Utils |