How to verify installation?

To verify the installation of a program like Hydra, you can use the which command in the terminal. Here’s how to do it:

Open your terminal.
Run the following command:
```
which hydra
```
If Hydra is installed, this command will return the path to the Hydra executable, typically /usr/bin/hydra. If it is not installed, there will be no output.

Additionally, you can check the version of Hydra to ensure it is functioning correctly by running:

hydra -v

This will display the version of Hydra if it is installed properly.