Connect vCenter or ESXi Host From vSphere Power CLI

> Connect-VIServer  “vCenter Name / IP ”    

It will ask for user name and password to access vCenter  , or alternate we can add username and password to same line .
Use the below basic commands
> Get-Esx “ESx hostname/ IP ”  

You have to  type in the credential box that pops up when the credentials  parameters are omitted.

Figure 8

> Connect-VIServer  “vCenter Name / IP ”  -user “username”  -password “password “