Kranzes

Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

4abhinavjain

# should works on any cloud-init enabled hypervisor (openstack.. )

# start from a normal ubuntu 20.04 install as minimal was not available for ARM64
# Since ARM64 machines has higher RAM, Shrinking is desired but not necessary. Instead we will increase tmpfs to 1700MB

# Getting root (if sudo -i doesn't work then set a root password beforehand using 'sudo passwd root'

sudo -i

# make sure we are on the highest kernel, so we can delete all the others ...

cassidoo

import time

print "..."
time.sleep(1)
print "..."
print "..."
print "..."
print "..."
time.sleep(1)
print "..."

jblang

Emulators

VICE is the best by such a commanding margin that you really needn't look elsewhere. Open source and has the largest community.

However, other options are:

• CCS64, Lots of features, but I found it to be painfully slow. Shareware.
• Hoxs64. Decent, but not as full-featured as VICE. The ML monitor seems nice.
• Frodo is pretty outdated and the author admits as much.
• micro64 seems promising but incomplete.