how to give a user the root access? and how to ....

Hi

i want to know how to add a user and give him a full root access without make a folder in home directory ... i need some thing like editing passwd and shadow files ....

also i want to know how can i make a safe connection between my two servers ..... i mean use one root from 1st server to connect to 2nd server directly ...without typing the second server root password ....

thnx in advancehow to give a user the root access? and how to ....

 

 

 

 

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