How to use Multiple SSH Keys | Managing Different SSH Keys on your System

There’s a good chance you’ve been using SSH (Secure Shell) to access your Linode from your computer. In this video, we’ll cover how to generate and use SSH Key Pairs for easily and securely logging into your server.
Chapters:
0:00 Introduction
0:54 SSH Key Management
2:43 Create A New SSH Key
5:49 Removing a SSH Key
6:11 Creating a Specific Type of SSH Key
8:04 What is the Difference?
9:09 Creating Other Keys
9:58 Associating a Key to a Server
12:11 Connecting to a Server with a Specific Key
13:40 What is the SSH Agent?
14:57 Using the SSH Agent to Unlock the Key
16:54 Taking Our SSH Config to the Next Level
18:14 Connecting Without Specifying a Key
19:38 Quick Refresher
20:52 Conclusion
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#Linode #SSH #Linux #AlternativeCloud
Product: Linode, SSH Keys, SSH Key Management; Jay LaCroix;

[@AngriestEwok]

Today I just had to spend the afternoon learning this technology properly for the first time in my career. I've always been a (L)user of SSH without really understanding how to use it properly, and this helped fill in the blanks. Thanks.

[@NinjaBranDizzzle]

Explained flawlessly, thank you for this video

[@zigforjustice]

Literally needed to do this today and found this immensely helpful

[@dodi981]

Not only gifted with Linux but also in teaching and explaining. Really appreciate it. I had several domestic servers. Just moved to linofe and paid for my first server.

[@rogerwprice]

This is super useful - thanks. Love that you explain things STEP BY STEP with increasing sophistication

[@SteveWeltman]

THIS! This tutorial is the only one of the 4 that I looked at that talked about the 'config' file in the user's .ssh directory. Quite frankly a game changer. I am certain that there are security tradeoffs somewhere with this file but based on the person's system permissions for the directory (users are advised to use chown to their own user and group) and the chmod to 700 so it's reachable, its just enough info to make ssh-ing sessions a lot less arcane and context switch intensive looking for secure passwords or whatever. Using a modern ssh key format like ed25519 makes complete sense as well from a security and speed perspective. What a great tutorial! So glad you posted this.

[@norithegoldendoodle8931]

Went through a quite a bit of tutorial flops before I found this gem. Thank you!

[@oluwabusayoshofowora4372]

Just so happy I found this. My headache is solved. Thanks.

[@mdjuhaeradittya]

Thanks a lot! Very helpful.

[@MerleCox]

As a content creator I must say, your video's are well done, easy to follow, and very useful!

[@nelke.michael]

Amazing. Thank you so much!

[@AndreReisAndrecsreis]

Thank you a lot for this video! I spent a couple hours trying to figure it out why my others ssh keys were not working.

[@Efim88]

Thank you for such a useful guide! I have another issue, I have 3 PCs (home, work, laptop) and I need to have access to my server from all my workplaces. Is it better to duplicate them or should I generate new ones for all PCs?

[@armannataee5711]

thanks for very usefull lesson

[@agaroui]

thanks a lot very helpful !!!

[@bin4rym4ge]

Thanks and God bless.

[@hamidja1537]

Thanks for sharing

[@rexby]

18:11 When closing the terminal, the ssh-agent does not close. You can simply export the two environment variables (SSH_AUTH_SOCK and SSH_AGENT_PID) from the previous terminal and everything will work the same way.

[@user-rn5em8pm4w]

Great video !!!

[@javaboy6581]

Wow, very good explanation! How can combine ssh key with two factor? Can I use together?

[@seven6586]

Hi, do you create a separate key for every server or for every user on a server as well? thanks

[@KarlBrouillette]

I've seen a lot of your content, very well done. I have a question on this topic, is there a way on Windows to setup my .ssh keys as you've demonstrated on your Linux client?

[@ricko13]

awesome 💪 didn't know about the ed25519 key type

[@y2kenh]

wished it was called ed209

[@flaviomoreira01]

Is it really necessary to run ssh-agent after adding keys to config file? Because I always assumed that the SSH command would read its parameters from the config file Hence no need for ssh-agent.

[@balajimarisetti4245]

topclass

[@xm6250]

You are the Gigachat of linux explanations.

[@comprofix]

ACME - Classic cartoon company that Wile E. Coyote would get all his good from to capture Road Runner Shinra - I had too Google. Either Fire Force or Final Fantasy 7 Skynet - AI from Terminator

[@dohjryt]

As an old retired tech admin guy, this brings back a lot of good memories. You showed some good advanced techniques to keeping everything secure while easy to manage. Good job!

[@alvaradodev9428]

No what I want! What about for the server side adding or banning keys to several nodes?

[@benb.525]

What about Umbrella Corp...?

[@JuniorReveron]

Acme is from Looney Tunes where Coyote order everything, Shinra is from Final Fantasy VII is the Malevolent Corporation and Skynet is from The Terminator the evil computer system from the future.

[@rondotexe]

Liking for the FFVII reference!

[@gabormiklay9209]

Skynet is from 'Terminator'.

[@McDuffington]

ssh-copy-id is great and all, but still leaves password authentication enabled.

[@homeandtechgeek]

why its ed25519 ? are these numbers that you just want at your choice?

[@inef85]

no. it's a specific cryptographic standard. "Ed" from Edwards (twisted elliptic curves) "25519" from Curve25519, which is a specific mathematical description of one of the components used.

[@tubeDude48]

Why use *CTRL-O* ? Just enter: *CTRL-X Y* in "nano"

[@JacquesCoetzerAU]

Or just hold down Ctrl then do S, X

[@frankbaron1608]

how do you upload the key to the server if password authentication is turned off?

[@dovedozen]

Hearing "shinra" out of nowhere really soothed the pain of having to learn how to juggle multiple different identities with no GUI and very little understanding of Anything Involved; thank u. This would be an amazing tutorial either way but now I'm thinking about how pretty they made Cloud in the ff7 remake instead of how mad GitHub makes me

[@softwaredepartment3541]

Account creat nhi ho raha hai

[@susancomo1557]

Mooji

[@adriancamilovillajimenez8010]

I have created 2 ssh keys, but there is something that i don't understand. I cannot associate my ssh keys, i'm using a personal github account, and another gitllab account, i want to use both ssh keys to work with diferent repositories. But when i try to associate a key with "the server" as $ ssh -i ~/.ssh/githubexample_key githubexample always appears this error => ssh: Could not resolve hostname githubexample The thing is that i don't know "how to get to the gitlab server", or "the github server", by the other hand i understood (maybe missunderstood) that the server is connected with the name of the key before the underscore.