Diagnosis

Boot the server in Rescue mode

How to boot and connect to a cloud server in Rescue and Diagnostic Mode

Restore the server from an ISO image

How to restore a server from an ISO image

Change and restore server password

How to Change and Restore Cloud Server Password in Rescue and Diagnostic Mode

Test disk performance

How to test cloud server disk performance with the fio utility

Switch network configuration to netplan

How to switch network configuration from ifupdown to netplan in cloud servers created from off-the-shelf images on Ubuntu 18.04, 20.04, and 22.04