reset pw ubuntu 20.04 login incorrect

I installed Ubuntu Server 20.04 on my lap without gui interface. . After the installation of the server has finished, I booted for the first time and I unable to login ("login incorrect"). Here is the solotion: use this command to reset the password of your linux server: rw init=/bin/bash passwd root exec /sbin/init or follow this steps: • Reboot your computer. • Hold Shift during boot to start GRUB menu. • Highlight your image and press E to edit. • Find the line starting with "linux" and append rw init=/bin/bash at the end of that line. • Press Ctrl + X to boot. • Type in passwd username. • Set your password.