airmon-ng command not found

Hi.
I am looking into the WiFi tools in Kali, and am following a guide which the first step is to use program/command airmon.-ng.
I get error "Command not found" when I try this.
Looking for assistance in what to do, as not having any luck finding why this command is missing from my system.
Thanks for any help.

Hello MrCheese. I had the same problem and fixed this with command: apt-get install aircrack-ng. Try this command and if it is not helpful for you then you should build aircrack from source code

I'm having the same problem. I'm using Virtual Box and Kali 2020.3