It's happand after the laptop is accidently shutdown when battery is dry. Theb when I try to start the laptop it always show blank purple screen.
So I tried to select option "advance option" then select recovery. But the terminal show this:
ubuntu busybox v1.22.1 initramfs uuid xxxxx not exist
After strugling with tutorial around Askubuntu and from another sites unfortunately it still the same.
Then I tried to access recovery process and upstart on previous kernel version in the list on advance option page of start menu. It's working and everything accessible including the internet by command below.
sudo nmtui
Then from command line I remove active kernel
sudo apt remove linux-image-x.x.x-xx-generic linux-headers-x.x.x-xx-generic
Reinstall again the latest and perfect one of my Ubuntu version
sudo apt-get install linux-generic
Then reboot,
sudo reboot
Everything working like before in my case.