CTRL-ALT-F 1 through 7 gives you system command line terminals so you can fix problems in your system or other purposes, but for me I usually do CTRL-ALT-F1 to get a terminal so I can kill something (like Firefox) which went to sleep so badly that it's near shutdown my system's activity. And then CTRL-ALT-F8 returns you to your window manager.
The posting.org link did not work. Note that you can attach small files to your post; for instance if you take a screenshot and attach it, this would work so long as the file is smaller than 256k.
You marked the thread as solved. Did you solve it? Can you relate how you solved it, or if you realized/learned the conventions for CTRL-ALT-F keys?
It helps other users who may see the same problem or misunderstandings if you post your resolution; otherwise the question can show up when people search in LQ, they'll see it and not understand how it got solved.