I changed permissions of home directory to list files only after that when I restarted my system its not accepting my password which is correct one. So after that I searched for solution on internet to recover my password using boot in recovery mode still not any effect noticed.
Edited
Distro : Ubuntu 18.04.3 LTS Desktop
chmod 755 /home
andchmod 755 /home/yourusername
. – Jos May 29 '20 at 11:32