In case of deleted folder /usr/include folder from ubuntu, to restore it back to normal

login in to console, use CTRL+ALT+F1 to move to the console, type out the following command, this should restore the packages and everything should be fine.

sudo apt-get install --reinstall $(dpkg -S /usr/include/*|cut -d':' -f1|tr -d ','|tr '\n' ' ')