Looking for esx script

Hi

I am trying to develop a script which can help us to login to esx server (Read ESX server name from text,excel,csv) with normal user account and then su - and perform some opeartions. I am facing problem in the su - part, please let me know if anyone has done this

1. ssh ESX host with Normal User Account. (Read the ESX server name from text,excel,csv)

2. su - (Give root password, read probably from txt file)

Thanks

Pranab