apt-utils software package provides package management related utility programs, 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 apt-utils
apt-utils is installed in your system.
Make ensure the apt-utils package were installed using the commands given below,
$ sudo dpkg-query -l | grep apt-utils *
You will get with apt-utils package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | apt-utils |
| Version | 1.0.9.8.3 |
| Description | package management related utility programs |
| Sub Section | admin |