Fsck output does not match tutorials...

[Bo Berglund]

I have an erroneous disk (it ran out of disk space during a sudo apt
full-upgrade operation and Linux crashed).
Linux won't boot now.

I can put it into a USB carrier and examine it on another system:

sudo lsblk -o UUID,NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL,MODEL
UUID                                 NAME        FSTYPE  SIZE MOUNTPOINT LABEL
MODEL
                                     sda                 7.4G
UHSII_uSD_Reader
1591-0E10                            +-sda1      vfat    256M
c14f2d5f-b499-41df-b7ce-15bdf933cdff +-sda2      ext4    7.2G <== repair?

It turned out that free space on sda2 is zero, that is why Linux crashed, I
guess.
But now I have freed up 40% by deleting a few very big files in the home dir.
But there is more to do because Linux will not boot anyway.

So I figured I could do as several on-line tutorials suggest:

sudo fsck -N /dev/sda2
fsck from util-linux 2.33.1
[/sbin/fsck.ext4 (1) -- /dev/sda2] fsck.ext4 /dev/sda2

This response is not shown in any of the tutorials I found....

What am I doing wrong?
Can the disk be repaired?

-- 
Bo Berglund
Developer in Sweden