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How-to-reset-Password-of-root.md

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Reset and Change Root Password via GRUB Menu at Startup

"This guide explains how to reset and change the root password by editing the GRUB menu during system startup. Follow these steps:

Steps to Edit GRUB and Reset Password:

  1. When the PC starts, press e to edit the GRUB menu.

  2. Find the keyword ro (read-only) and replace it with rw (read-write):

  3. Add init=/sysroot/sbin/sh at the end of the line.

    • This enables you to access the root shell

    • Press Ctrl + X to continue the boot process.

    • Example line:

load_video 
set gfxpayload=keep 
insmod gzio 
linux ($root)/vmlinuz-5.14.0-522.e19.x86_64 root=UUID=81745846-b7a0-43a5-9e a5-eeb05633f54f `ro`  crashkernel=1G-4G:192M, 4G-64G:256M,64G-:512M resume UUIDS 
=4057a1e9-73f4-42e8-82cb-bf7b380f401b rhgb quiet 
initrd ($root)/initramfs-5.14.0-522.e19.x86_64.img $tuned_initrd 





Minimum Emacs-like screen editing is supported. TAB lists completions. Press Ctrl-x or F10 to boot, Ctrl-c or F2 for a command-line or ESC to discard edits and return to the GRUB menu
  • Modify it to:
load_video 
set gfxpayload=keep 
insmod gzio 
linux ($root)/vmlinuz-5.14.0-522.e19.x86_64 root=UUID=81745846-b7a0-43a5-9e a5-eeb05633f54f `rw init=/sysroot/sbin/sh`  crashkernel=1G-4G:192M, 4G-64G:256M,64G-:512M resume UUIDS 
=4057a1e9-73f4-42e8-82cb-bf7b380f401b rhgb quiet 
initrd ($root)/initramfs-5.14.0-522.e19.x86_64.img $tuned_initrd 




Minimum Emacs-like screen editing is supported. TAB lists completions. Press Ctrl-x or F10 to boot, Ctrl-c or F2 for a command-line or ESC to discard edits and return to the GRUB menu

  1. Change the default root path to access all binaries:

    • Run the following command: 
      chroot /sysroot/

  2. Update the root password:

    • To change the root password, run: 
      passwd

  3. (OPTIONAL) If SELinux is enabled, create an autorelabel file:

    • This step ensures SELinux relabels the files on the next boot: 
      touch /.autorelabel

  4. Reboot the system:

    • Finally, reboot the system with the following command: 
      reboot -f

by Tanush Kushwah