* linux: usually search for "terminal" in your app menu, on KDE it's Konsole
* windows 10: open cmd or powershell
* windows 10, alternative 1: you can use [WSL](https://docs.microsoft.com/en-us/windows/wsl/about), if you already have it set up, if you don't, it's easier to just use builtin ssh via cmd
* windows, alternative 2: you can use [PuTTY](https://www.chiark.greenend.org.uk/~sgtatham/putty/) (warning, putty stores keys in its own format, which can be tricky to deal with, recommended only to use if you don't use windows 10, or know your way around putty already)
* mac: browse to applications/utilities/terminal and launch terminal (or press cmd+space, start typing terminal, and press return)