How to Change User Password at Command Prompt on linux

At grub-boot loader screen select Recovery mode the version of the kernel that you wish to boot and type e for edit. Select the line that starts with kernel and type e to edit the line.

Go to the end of the line and type init=/bin/bash as a separate one word (press the spacebar and then type init=/bin/bash). Press enter key to exit edit mode.

Back at the GRUB screen, type b to boot into single user mode. This causes the system to boot the kernel and run /bin/bash instead of its standard init. This will allow us gain root privileges (w/o password) and a root shell.

If you wanna reset root password remount paritions
mount -rw -o remount /
Setup root password


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