I have an Ubuntu 16.04 64 bit installed (via dual boot) on a Dell Inspiron 15 3000. Every time I try to boot into Ubuntu, this error comes up, and I'm driven into emergency mode. The error
This problem has cropped up a couple of times earlier too. And I had to reinstall Ubuntu back then, but now I don't want to do that. Please help!
EDIT 1 (Sorry for the delay)
Output of dmesg | grep Command in emergency mode:
Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-88-generic root=UUID=xxx ro quiet splash vt.handoff=7
Output of dmesg | grep Command in live USB session:
Command line: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---