Rescue Disk Recommendations
I was wondering if anyone has any recommendations for a rescue ISO? I see there are a few out there. I have about two dozen servers (a mix of Red Hat 5 to 7), that have to have their passwords reset. We have no access to the system. I have not been on site yet. I'm trying to get a few usbs together.
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You can give SystemRescueCD a try. :) Regards... |
Any iso of the relevant architecture that will boot. Your Redhat CD/USB/whatever should suffice.
If you can't get on to the net to pull down anything else you need, you might need something more encompassing. Systemrescue should be good, although I haven't needed to use it in a while. |
Thank you. I wasn't sure if my CentOS Live CD would have suffice or not. I don't know if there are any RAID or specialties needed. Maybe those ISOs will work. I loaded Knoppix on a USB, and I'm playing with that on a test machine. I'll look into SystemRescueCD. Monday I go onsite, I'll close the post then stating what worked best for me.
Ron |
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That said...no need to bring a sledgehammer to swat a fly. If you can log in as a 'regular' user, type "cat /etc/group | grep -i wheel" in at a terminal prompt. If any users are in that group, you *MAY* be able to run "sudo -s" (or at least "sudo passwd root") as one of those 'regular' users, and get the password changed. You may also want to try these: https://access.redhat.com/documentat...ot-passwd.html https://www.tecmint.com/reset-forgot...os-and-fedora/ While it's for RHEL 4/CentOS, it *MAY* work on newer versions, since you're basically using grub to get to single-user mode. |
Also Centos info.
https://wiki.centos.org/TipsAndTricks/ResetRootPassword RH also offers support for their products. It may be wise to consider paying for it. |
init=/bin/bash maybe. (pics)
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Yo7u can boot from any live CD, chroot to the / of the installation, and run the passwd command to change the password.
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I think I'm leaning on chroot because I have no info about the system. Changing the root password right away may have unintended results. There could be a script of something running off of root. I am thinking of chroot to create an elevated user to get a window into the system first. There are upwards of two dozen servers that we have no control over. The previous admin is no more, and nothing is documented. I need to keep the damage and downtime as minimal as possible. I may just try to drop into initramfs via grub to chroot. If that doesn't work, I'll boot a CD.
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