Connecting to your instance
JupyterLab shows a login or token page instead of opening
This is a known token-encoding quirk. Copy the link from the console's Open JupyterLab button (not your browser's address bar), find the ?token= par...
I lost my SSH key - how do I add a new one?
If you can still connect, add the new public key to ~/.ssh/authorized_keys (or /root/.ssh/authorized_keys). If you're locked out: shut the instance do...
My web server is running but ports 80/443 are refused
Your instance's local firewall is blocking them. Verda's images use ufw : sudo ufw allow 80/tcpsudo ufw allow 443/tcpsudo ufw enable Check it took ef...
SSH says "Permission denied (publickey)" or "server refused our key"
This almost always means the wrong key, username, or IP. Connect as root , using the private key that matches the public key you selected at instance...
SSH warns that the host key / fingerprint has changed
A rebuilt instance (or a reused IP from a new spot instance) has a new host key, so this warning is expected. Remove the old entry and reconnect: ssh-...
I can't connect - "connection refused" or "connection timed out"
Work through these in order: confirm the instance is Running ; use the current public IP from the console (it can change after a rebuild); test fro...