ssh

adding keys

sudo apt-get install keychain
ssh-keygen -t ed25519 -C "stafford.williams@gmail.com"

linux:

echo "eval \`keychain --clear --eval id_ed25519\`" >> ~/.profile
cat ~/.ssh/id_ed25519.pub

macOS: see docs

removing known hosts

ssh-keygen -R THE_IP_ADDRESS_OR_URL

add new ssh key to linux vm

az vm extension set -n VMAccessForLinux --publisher Microsoft.OSTCExtensions --version 1.4 \
    --vm-name vmName --resource-group resourceGroup \
    --protected-settings '{"username":"user", "ssh_key":"ssh-rsa ..."}'

ssh-copy-id -i ~/.ssh/id_rsa.pub user@host

configure windows ssh

Set service OpenSSH Authentication Agent to Automatic and Start it.
In Powershell, ssh-add
In environment variables, add GIT_SSH=C:\Windows\System32\OpenSSH\ssh.exe

adding keys

removing known hosts

add new ssh key to linux vm

password-less login

configure windows ssh