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This question already has an answer here:

Ctrl+Alt+f1 through Ctrl+Alt+f6 will pull up terminals and Ctrl+Alt+f7 pulls up the xserver.

But Ctrl+Alt+f8 pulls a blank screen with a blinking cursor.

I can't type anything. Does this serve a purpose?

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marked as duplicate by Robie Basak, Eric Carvalho, Radu Rădeanu command-line Aug 27 '15 at 14:39

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

3  
This Q could be duplicated to askubuntu.com/questions/277517/what-does-ctrl-alt-f12-do, which has a good general explanation answering this. Likewise askubuntu.com/questions/14284/… is good. I'm new to StackOverflow / AskUbuntu - how can I duplicate a Q? – vorburger Jan 11 '14 at 11:35
up vote 4 down vote accepted

Only virtual terminals 1 through 7 are used by default on Ubuntu. Virtual terminals beyond 7 are left unused. But if you use multiple logins using the "Switch Account" feature, then these will go from 8 onwards.

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Is there a limit to virtual terminals? What will occur if there are more inactive user sessions than TTYs? – hexafraction Feb 8 '13 at 23:38

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