dbx12

The silver ring below the black plastic secures the thermostat to the valve. If you loosen that screw, it will release pressure on the valve which in turn opens -> heating starts. It is rather tricky to fasten that ring again unless you can turn the thermostat to MAX though. Is the silver ring tight right now?

uninstalls essential package

Why is my system broken? :O

If all of those servers are yours (which they likely are, since you get ssh access), you can use one key for all. Using different keys would make one compromised key less problematic. But if someone was able to copy one file of your system, they can copy multiple files.

That resolves keeping track of things as well 😄

I would recommend key based authentication for SSH connections. For the normal connection, the key pair is enough, if you want admin (root) access, you would use the command sudo which in turn requires a password. For creating a default admin account: Linux does this for you, it’s called root. You should create a personal user to work with in daily business and add it to the sudoers group (permits using the sudo command)