Stuck on TTY - Ctrl+Alt+F7 returns black screen

Question

I'm new to Linux and am stuck on TTY. My Linux distro is Lubuntu 14.04.4 LTS.

I have read some topics and the solutions proposed are not working to me. Ctrl+Alt+F7 returns a black screen with a text entry which, however, I can't write anything. Ctrl+Alt+F1-F6 takes me to normal TTY.

startx returns:

/etc/X11/xinit/service: 3: exec: /usr/bin/X not found 
xinit: giving up 
xinit: unable to connect to X server: Connection refused
xinit: server error

sudo service lightdm start returns:

start: job failed to start

UPDATE: I have studied my current situation a bit and I think that the problem is that "xorg.conf" file is missing or some similar kind of file. I followed instructions on "How to restore xserver?" and couldn't restore it yet.

Solution

Had the same problem. Almost got a heart attack. Pressing Ctrl Alt F2 solved the problem for me.

Comments

[web.learner]

You removed the X display server, a critical part of the system. How did this happen? That will help us find the best solution for repair.

[Yuri Camara Batista]

actually I was trying to learn more about linux and typed Ctrl+Alt+F1 to understand tty. Then i get stucked. I'm pretty sure i haven't typed anything then.

[web.learner]

Typing Ctrl+Alt+F1 doesn't do anything on its own, so that cannot be how the problem started.

[Yuri Camara Batista]

I turned off the computer after this hoping that restarting it would make GUI return... The commands I typed then are the writen above

[web.learner]

Did you restart in the middle of an upgrade perhaps?

[Yuri Camara Batista]

Not to my knowledge. I remember linux asked me for updates and I refused. When I typed Ctr+Alt+F1 I was only using firefox to read linux articles. I guess I will have to reinstall linux?

[Yuri Camara Batista]

Does someone have an idea what to do? I'm still with the problem. I'm considering to format the computer

[karel]

Does this answer your question? Switching between console and GUI

[chx101]

And wth does that do?