Resetting OpenSSH Host Keys (the easy method)

Рет қаралды 11,910

Күн бұрын

When creating a deployment image or template for distributing Linux to devices or servers, it's a good idea to make sure that you reset the host keys for SSH. In this video, I'll show you an easy method I found for automating this.
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⏰ TIME CODES
00:00 - Intro
02:27 - Creating a sample VM
06:09 - Resetting the machine-id
07:45 - Demonstrating the issue with host keys
13:27 - Adding a systemd unit to clear the SSH host keys
19:20 - Creating a Proxmox template with the systemd unit installed and enabled
Relevant links
Systemd unit file used in this video ➜ learnlinux.link/ssh-reset
Official blog post for this video (contains the commands used) ➜ www.learnlinux.tv/?p=1665*🎓 FULL LINUX COURSES FROM LEARN LINUX TV*
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Learn Linux TV provides technical content that will hopefully be helpful to you and teach you something new. However, this content is provided without any warranty (expressed or implied). Learn Linux TV is not responsible for any damages that may arise from any use of this content. Always make sure you have written permission before working with any infrastructure and that you are compliant with all company rules, change control procedures, and local laws.
#OpenSSH #Linux #HostKeys

Пікірлер: 25

@williamevans6830 2 жыл бұрын

And this is why I subscribe to the channel. Simple but highly effective solutions. Great content.

@VinceScovetta 23 күн бұрын

Thanks Jay... appreciate your approach to instruction

@camaycama7479 2 жыл бұрын

As always, super neat and straightforward! Great stuff, it is gonna help me out with the mess I'm actually dealing with my kubernetes cluster and workers!

@pawouapproval984 2 жыл бұрын

Hey Jay! Just picked up your Ubuntu Server book from the library, was hyped when I saw it there!

@LearnLinuxTV 2 жыл бұрын

That's so cool! I didn't even know any libraries were stocking it but that's really amazing to hear. I should check my local library out of curiosity.

@enziofrancescoli288 Жыл бұрын

Thanks Jay for creating the video. Best Wishes.

@johngoard8272 2 жыл бұрын

I know this is off topic but I have just started using Linux Mint again after a long break and have installed the OS on my older Sandy Bridge build permanently . Thanks to your tutorials I now have a different view of the system and am enjoying using it whereas before I got bogged down with the use of the terminal for example - thanks again for the videos:)

@LearnLinuxTV 2 жыл бұрын

I'm glad the content helped you out. That's awesome! Thank you so much.

@johngoard8272 2 жыл бұрын

@@LearnLinuxTV Yes Jay they were extremely informative and given in a very understandable manner as I was expecting to have to use the Terminal again as my previous experience of running a Linux distro. In fact, it isn't that different to Windows so it is going to be handy when my old machine runs out of Windows 10.

@ninja2807 9 ай бұрын

Great content. Now I have to re-do my VM template to use this solution 😊

@Appalling68 2 жыл бұрын

Excellent. Just freakin excellent. THANK YOU!

@storage000 2 жыл бұрын

Great stuff, Thank you Jay; have learnt a lot from your channel

@LearnLinuxTV 2 жыл бұрын

Glad to hear it!

@danielstellmon5330 2 жыл бұрын

Thank you for giving credit where its due on that script, even though you do not know the original author. For teaching I like the way you have this set up. In practice I would set up a GIThub with a bash script to install and set up the service.

@JPEaglesandKatz 2 жыл бұрын

Great video as usual.. Very helpful. I was wondering why I was getting this weird error message from time to time...

@rullywow3834 2 жыл бұрын

Love your Pop shirt! Great vid!

@LearnLinuxTV 2 жыл бұрын

Thank you!! 😁

@Karl3.142 2 жыл бұрын

Thank you. Does sys-unconfig also do this? I assume sys-unconfig also does other things as it puts the system back to the out-of-box setup screen.

@Ranblv 2 жыл бұрын

very useful thank you

@LearnLinuxTV 2 жыл бұрын

My pleasure.

@dragon3602010 2 жыл бұрын

What's the method you were talking about at the beginning, the cloudinet?

@theinvincible4933 2 жыл бұрын

its cloud-init

@ubmate2997 2 жыл бұрын

unable to get this to run on debian 11. the /dev/hwrng does not exist. any suggestions on what to do here? Thank you. Great video as always.

@d00dEEE 2 жыл бұрын

Next: Distribution of the new host keys to your ssh client machines. 😉 Assuming you've set "StrictHostKeyChecking yes" in ~/.ssh/config and need to automate replacement of values in known_hosts...