how to create multi nodes at once?

Great question! I’d love more details — are you hoping to spin up multiple of the same types of Linodes in the same data center? Do you want to vary the plan sizes or regions?

There’s no way to do this automatically using the Cloud Manager, but there are some creative ways to do this using our API and The CLI, which offer you more control and insight than our more user-friendly Cloud Manager.

This older question proposes a way to deploy multiple Linodes simultaneously in different regions with a simple Bash script. It might be a good starting point for you.