agrep software package provides text search tool with support for approximate patterns, 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 agrep
agrep is installed in your system.
Make ensure the agrep package were installed using the commands given below,
$ sudo dpkg-query -l | grep agrep *
You will get with agrep package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Text Processing |
| Package | agrep |
| Version | 4.17-9 |
| Description | text search tool with support for approximate patterns |
| Sub Section | Text |