Locking Down Thin Clients

[Steve Wu]

I'm tinkering and have a basic Edubuntu LTSP server setup. Client PCs can connect and login using a generic ID/PWD we setup. How do I go about locking down the desktops so when a user logs in, they see the same desktop no matter what someone did beforehand? 

Is there a built in tool to use? If not, what tools do you recommend? 

Thanks in advance!
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