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jeffdoug1
Mission Specialist
Mission Specialist
  • 815 Views

rd.break isn't working in RHEL9

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So what is the correct procedure to break into a system in the RHCSA testing environment so you can change the root password? I think have one more chance to take the test and I don't want to be caught with this again.

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TheIF
Mission Specialist
Mission Specialist
  • 744 Views

Hi, @Tracy_Baker  suggests this

https://learn.redhat.com/t5/Platform-Linux/Reset-forgotten-root-password-in-RHEL9/m-p/34115#M1884

It applies to messed /etc/fstab too.

I'd like to add that instead of its 5th point ( touch /.autorelabel ), I rather use /usr/sbin/load_policy -i and then /usr/sbin/restorecon -vvRF /etc ( or whatever dir you made changes into ), it is way faster ; then, remount / readonly and then pull the plug

PATH is unset, so you have to call commands using absolute path

my 2 c

Study has no limit
Improvement has no limit.

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TheIF
Mission Specialist
Mission Specialist
  • 745 Views

Hi, @Tracy_Baker  suggests this

https://learn.redhat.com/t5/Platform-Linux/Reset-forgotten-root-password-in-RHEL9/m-p/34115#M1884

It applies to messed /etc/fstab too.

I'd like to add that instead of its 5th point ( touch /.autorelabel ), I rather use /usr/sbin/load_policy -i and then /usr/sbin/restorecon -vvRF /etc ( or whatever dir you made changes into ), it is way faster ; then, remount / readonly and then pull the plug

PATH is unset, so you have to call commands using absolute path

my 2 c

Study has no limit
Improvement has no limit.
huyvl3-fptcloud
Flight Engineer
Flight Engineer
  • 675 Views

(sorry my mistake)

jeffdoug1
Mission Specialist
Mission Specialist
  • 570 Views

Thank you for the link and for the extra information. 

I installed 9.0 onto my laptop and have tested the solution in the link.  It looks like adding rw in front of init=/bin/bash on the kernel line will work too as opposed to doing the mount -o rw,remount / at the bash-5.1# prompt. 

Do you know if there is anything listing the other differences specific to 9.0?  I can’t find anything online that specifically says, “here’s a list of things that work in other RHEL releases, but do not work in 9.0”.  Or something like that. 

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huyvl3-fptcloud
Flight Engineer
Flight Engineer
  • 674 Views

Hi @jeffdoug1, in RHEL v9.1 and 9.2 and 9.3 versions, you can apply "rd.break" to any line in the grub menu. But for v9.0 only, you must select the second line with the word "rescue" to be able to apply "rd.break", however if you accidentally select the first line (without the word "rescue"), you must apply the solution @Tracy_Baker described, @TheIF above mentioned that solution in the link.

I have experienced all 4 RHEL versions from 9.0 to 9.3 by downloading qcow2 and also iso.

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