how to set wifi password in ubuntu-19.10-preinstalled-server-arm64+raspi3.img.xz

[chelmite2]

I installed ubuntu-19.10-preinstalled-server-arm64+raspi3.img.xz on an SD card, and got my Raspberry Pi 4 to boot.
However, the next instructions in https://ubuntu.com/download/iot/raspberry-pi say to run apt-get. Apt-get requires a network.

So, where do I add my wifi passwords? I tried putting the NetworkManager directory on a USB stick, but the Pi won't mount it.

[uRock]

Moved to Networking & Wireless.

[chili555]

I installed ubuntu-19.10-preinstalled-server-arm64+raspi3.img.xz on an SD card, and got my Raspberry Pi 4 to boot.
However, the next instructions in https://ubuntu.com/download/iot/raspberry-pi say to run apt-get. Apt-get requires a network.

So, where do I add my wifi passwords? I tried putting the NetworkManager directory on a USB stick, but the Pi won't mount it.

You put the details in netplan. You can find a template for wireless here:

cat  /usr/share/doc/netplan/examples/wireless.yaml

Follow any changes to the /etc/netplan/*.yaml file with:

sudo netplan generate
sudo netplan apply

If you need step-by-step guidance, please post back.