I'm not entirely sure what you're asking.
Prioir to our upgrade to v10.1 we used powershell script firing tabadmin commands to sync users with the server from AD. This script was scheduled via windows scheduler on the Tabelau server itself as mentioned by Diego above.
I documented this process and the scripts used here : Automatically sync Tableau groups with the AD
Now we've got v10.1 we don't need to do this as the server UI has all the functionality embedded now which means one less step 'customisation' we need to worry about when it comes to upgrades etc.
What are you actually trying to acheive when you say "you want to manage what you see in the settings tab through command line"...?