Ubuntu cannot open OS , also freezes

[BitSeeker]

@mikedb

I just remember that I still have the USB that I used to install Ubuntu and there was an option to try Ubuntu so I select that.

Yes, there is usually such an option. Nowadays we tend to use USB sticks so i guess I should have said LiveUSB rather than LiveDVD, but the idea is the same, it allows you to boot the distro to have a look at without installing it.

Short cut to a command terminal is usually Ctrl-Alt-T.

@mikedb

Dirty bit is set. Fs was not properly unmounted and some data may be corrupt.
 Automatically removing dirty bit.

That’s because the file system was not dismounted properly. Assuming shutdown done in haste?

@mikedb

ubuntu@ubuntu:~$ sudo fsck -y /dev/sdb*
fsck from util-linux 2.39.3
e2fsck 1.47.0 (5-Feb-2023)
ext2fs_open2: Bad magic number in super-block
fsck.ext2: Superblock invalid, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sdb

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem....

The superblock is going to be invalid because only /dev/sdb2 is an ext partition, not the entire disk.

@mikedb

fsck.fat 4.2 (2021-01-31)
/dev/sdb1: 17 files, 1577/274657 clusters
Found a gpt partition table in /dev/sdb
e2fsck 1.47.0 (5-Feb-2023)
/dev/sdb2: clean, 309934/30457856 files, 8038027/121820928 blocks
ubuntu@ubuntu:~$ 

That is now post automatic cleanup and looks fine.

As a matter of curiosity, when the system freezes, are you able to get a response to Ctrl-Alt-F1?(Ctrl-Alt-F7 should return to a graphical environment).

While booted from the USB stick, can you show:

sudo smartctl -x /dev/sdb