1) I am guessing you can not login due to other post so you do need to read the chown command
get a getty
hold down CTRL key and ALT key and press either F1 or F2 etc....most distros have your graphics on getty 7
login as root
run
Code:
ls -al /home/yourlogin name
if you have lost ownership fix it using root powers
you may also need to fix read write permissions but you can report what you find later
Code:
chown yourname:yourname -R /home/<your login name>
reboot and see if you can login
2)
I suggest you get a linux live cd/usb.
It always helps in the long run to have a dedicated live product to let you look at things or rescue things.
eg
https://distrowatch.com/table.php?di...n=systemrescue
I use this distro to make backups using
fsarchiver rather than luckybackup
https://www.fsarchiver.org/quickstart/
however I use it for a full parition image to save or restore so that on a SSD writing takes just a few minutes and restoring about 40 seconds depending on how much data you have collected.
system rescue automatically is a root power autologin
Code:
# set up mount point
mkdir /z
mount /dev/sda4 /z
# to save a single partition
fsarchiver savefs /z/1.fsa /dev/sda1 -a
# to restore it after setting up mount point as this is a new boot up
fsarchiver restfs /z/1.fsa id=0,dest=/dev/sda1