it happened to me 4/5 times that I had to do a forced shutdown (by holding down the power button) because Ubuntu got frozen (the freezes occurred when I tried to drag and drop the icons from the desktop to Cairo-dock or due to a very heavy Gnome extension, anyway now I have removed both and I have no more problems). However, I later discovered that I could avoid a forced shutdown, since even in the event of a freeze with the combination "CTRL + ALT + F1" it takes me back to the login screen from which I can shutdown or restart.
My question is: in these 4/5 times that I have forced the PC to shutdown, instead of rebooting with "CTRL + ALT + F1", can I somehow have damaged Ubuntu? And, if so, is there a way to verify it?
The only check I've done so far was a fsck from Live-USB to my Ubuntu partition, which returned "non-contiguos 0.3%". Do I have to worry about this result? Can I do other tests?
Thanks in advance for your replies!
sudo dpkg --configure -a
to be able to resume the install.