Reset root Password

	If you forgot root Password, it's possible to reset it like follows. (This is only for the case GRUB boot loader Password is not set)
[1]	Restart System and when GRUB2 boot menu is displayed, Push [e] key. Next, Proceed like follows to reset root password.

# push [e] key CentOS Stream (5.14.0-115.el9.x86_64) 9 CentOS Stream (5.14.0-105.el9.x86_64) 9 CentOS Stream (5.14.0-86.el9.x86_64) 9 CentOS Stream (0-rescue-ab414d4792d04b9dbc1e2361f936e849) 9 Use the ^ and v keys to change the selection. Press 'e' to edit the selected item, or 'c' for a command prompt. # add [rw init=/bin/bash] to the end of [linux] line load_video set gfxpayload=keep insmod gzio linux ($root)/vmlinuz-5.14.0-115.el9.x86_64 root=/dev/mapper/cs-root ro crashk\ ernel=1G-4G:192M,4G-64G:256M,64G-:512M resume=/dev/mapper/cs-swap rd.lvm.lv=cs\ /root rd.lvm.lv=cs/swap console=ttyS0,115200n8 rw init=/bin/bash initrd ($root)/initramfs-5.14.0-115.el9.x86_64.img Press Ctrl-x to start, Ctrl-c for a command prompt or Escape to discard edits and return to the menu. Pressing Tab lists possible completions. # after inputting above, push [Ctrl-x] key to proceed ..... ..... [ OK ] Stopped Rule-based Manager for Device Events and Files. [ OK ] Closed udev Control Socket. [ OK ] Closed udev Kernel Socket. [ OK ] Stopped dracut pre-udev hook. [ OK ] Stopped dracut cmdline hook. Starting Cleanup udev Database... [ OK ] Stopped Create Static Device Nodes in /dev. [ OK ] Stopped Create List of Static Device Nodes. [ OK ] Finished Plymouth switch root service. # after prompt is displayed, do like follows bash-5.1# # set SELinux relabeling on next boot if you enabling SELinux bash-5.1#  touch /.autorelabel # set password bash-5.1#  passwd Changing password for user root. New password: Retype new password: passwd: all authentication tokens updated successfully. # restart System and complete to reset bash-5.1#  exec /sbin/init