Show the version of your Mint-Distro

Terminal:

cat /etc/*-release

or shorter:

inxi -S

Linux can't see anything anymore OR can't boot with wrong graphics setup

After you have "hacked" around with your wrong graphic drivers. Or you just wanted do fiddle around new setups for the screen.

You boot again.
Now it hangs....
OR it shows nothing anymore.

Take a boot-able disk / stick and boot into that linux.

Search for the file on your drive of "the other defective linux on the machine".

/etc/X11/xorg.conf

Copy / paste this over everything:

Section "Device"
   Identifier   "Configured Video Device"
   Driver      "fbdev"
EndSection

Section "Monitor"
   Identifier   "Configured Monitor"
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Monitor      "Configured Monitor"
   Device      "Configured Video Device"
EndSection

Now you can reboot your PC and it will start into a default resolution. Change it from there to whatever you like.
I was so glad I've found this tip!

Folder with sub-folders, change rights

sudo find "foldername" -exec chmod a+rwx {} ";"

Now you have all the rights on the folder selected, including the sub-folders with all it's files.

Can't disable a Screen-saver under Xubuntu

Watching a movie and suddenly it switches to a black screen. It's anoing.

The Screen-saver was disable by the way and so was the Power Manager.

Open terminal and type:

xset q

You can see a list of information including some infos about "Screen Saver".
Does it say "prefer blanking YES"?

There is the problem.

You could set it of with "xset s noblank". But after reboot it does it again.

The solution is to put the following line into a "Application Autostart" call.

bash -c "xset s noblank; xset s off"

Solution found here:
ubuntuforums.org