Alright, I have an Ubuntu server on which I couldn't connect to my WPA2 secured Wi-Fi network.
Apparently I need wpa-supplicant to be able to connect to it
(see How do I connect to a WPA wifi network using the command line?), but ironically I can't download it being offline. So, how can I download wpa-supplicant, get it on a USB device and install it on the server? I have no idea so far...
PS: I only have a Mac as a primary machine, so I can't download it from another Ubuntu.