Literally no idea what you're asking. Please try again.
I am talking about this command
On my centos, I have that, but ESX has no such command.
[mahmood@hpc ~]$ at
-sh: at: not found
ESXi is not Linux, you can't expect them to have the same set of commands.
What are you trying to get your host to do?
I want to execute some power offoff commands at specific dates. The purpose is to remove expired accounts basically and return them back once the user requests.
Look at remote execution script options such as PowerCLI.