I made the computer disk read only by mistake and after that I logged off from the Ubuntu and switched off my system. When I started my system then it is unable to restart or reboot. Clicked Ctrl+F2 but it is only showing
dev/sda6: recovering journal
dev/sda6: clean, 242560/1187840 files, 3331370/4742144 blocks
I'm unable to do login or anything after this. System is also not going to bios mode and also unable to re-install the Linux via flash driver as not getting reboot options. Can't do anything after this: