Ssh Troubleshooting Scenarios

Scenario: "Nuuk": More SSH Troubles

Level: Easy

Type: Fix

Access: Paid

Description: (NOTE: if you are a Pro user, you cannot SSH directly into this VM; click the "Open the Server Terminal" button to use the web browser instead).

SSH seems broken in this server. The user admin has an id_ed25519 SSH key pair in their ~/.ssh directory with the public key in ~/.ssh/authorized_keys but ssh 127.0.0.1 won't work.

Test: You can ssh locally, i.e. ssh admin@127.0.0.1 works.

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 10 minutes.

Scenario: "Pokhara": SSH and other sshenanigans

Level: Hard

Type: Fix

Access: Paid

Description: A user client was added to the server, as well as their SSH public key.
The objective is to be able to SSH locally (there's only one server) as this user client using their ssh keys. This is, if as root you change to this user sudo su; su client, you should be able to login with ssh: ssh localhost.

Test: As user admin: sudo -u client ssh client@localhost 'pwd' returns /home/client

Time to Solve: 30 minutes.