Question: Which commands to use to shutdown with safety the server;
What do you mean with "shutdown with safety" and "start with safety"?
BTW, the server has two powersupplies. Why don't you replace the cables one by one? You wouldn't have to shutdown the server at all.
I want to change the power source of the server: move from one power source to another one.
with safety means shutdown and be able to start easily.
Thanks for your help.