I followed instructions found online to install and configuring a "2 name nodes" + "10 data nodes" hadoop cluster on CentOS 8.
I created a wheel user called "hadoop" on all nodes and setup passwordless ssh under this user.
The install and configuration were done under root.
When I start up all services, ssh to all nodes are showing "access denied"
What user should I use for hadoop installation?
What user should I use for hadoop operations?