alternate for aircrack-ng



When i tried to install aircrack-ng in ubuntu it showed this message
Package aircrack-ng is not availablr,but it referred to by another package.
how ever the following packages replace it:

whats is the meaning of it and also
tell me the alternative ways to get my forgotten wifi password

What version of Ubuntu are you using?

Have you run
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

You can reset your Router to factory default. Normally by pressing the button on the back for a while. Google your Router, Make and Model to find out how to access it. Then reset the password
Can you connect to the Router by cable and try that again? What happens?

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