kdumpctl man page
kdumpctl — control interface for kdump
kdumpctl is used to check or control the kdump service. In most cases, you should use systemctl to start / stop / enable kdump service instead. However, kdumpctl provides more details for debug and a helper to setup ssh key authentication.
Start the service.
Stop the service.
Prints the current status of kdump service. It returns non-zero value if kdump is not operational.
Is equal to start; stop
Helps to setup key authentication for ssh storage since it's impossible to use password authentication during kdump.