1. Ssh Key Generation Linux
2. Generate A New Ssh Key And Delete Old Version

• Nov 23, 2016  Once you’re in, you can remove the old key using vim /.ssh/authorizedkeys Just go to the line with the old key and remove it: dd Note: If you tried editing the file and didn’t save it,.
• I set a passphrase when creating a new SSH key on my laptop. But, as I realise now, this is quite painful when you are trying to commit (Git and SVN) to a remote location over SSH many times in an.
• Delete a Key from Pantheon. To delete a key, go to the Account tab of your User Dashboard and click SSH Keys. Click the Remove button next to the key you want to delete: If you have active sites and no keys remaining, you can still access the sites. Make site changes via.
• Jun 09, 2018 Linux Regenerate OpenSSH Host Keys: Explains how to change / regenerate OpenSSH host server keys on a Debian / Ubuntu Linux to fix security issues or KVM VM guest.

Click on your profile pic in upper right corner and go Settings, then SSH and GPG keys. Click “New SSH key”. Paste your public key in the “Key” box. Give it an informative title, presumably related to the comment you used above, during key creation. For example, you might use 2018-mbp to record the year and computer. Click “Add SSH.

Hi!

I created a rsa-ssh key about a week ago and was able to connect it perfectly.
Due to technical issues on my laptop I had to reset it to factory settings, and I forgot to save the rsa private key.

I am trying to create a new set of ssh keys. I deleted the current ssh keys and created a new set and added the new rsa pub key on digital ocean.

Nevertheless when trying to connect ssh root@stashquad.com it still would not work. I logged into the server via the DO console and did cat ~/.ssh/authorizedkeys. The outputted key was the old key, which surprised me since I thought DO was in charge of updating the authorizedkeys file when updating the SSH Keys on DO. So I deleted authorizedkeys and created a new one with the correct permissions (600) and typed the entire idrsa.pub in it since clipboard is not enabled on your DO console. Still does not work. Now I can not delete the current SSH Key because of error Not Found on DO.

HELP! haha :)

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×How do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/ssh_host_* files? Can I safely regenerate ssh host keys using remote ssh session as my existing ssh connections shouldn’t be interrupted on Debian or Ubuntu Linux? How do I regenerate new ssh server keys? How to regenerate new host keys on a Debian or Ubuntu Linux?

Ssh Key Generation Linux

[donotprint][/donotprint]To regenerate keys you need to delete old files and reconfigure openssh-server. It is also safe to run following commands over remote ssh based session. Your existing session shouldn’t be interrupted.

Why regenerate new ssh server keys?

Most Linux and Unix distribution create ssh keys for you during the installation of the OpenSSH server package. But it may be useful to be able re-generate new server keys from time to time. For example, when you duplicate VM (KVM or container) which contains an installed ssh package and you need to use different keys from cloned KVM VM guest/machine.

Steps to regenerate OpenSSH host keys on Linux

Let us see all steps

Step 1 – Delete old ssh host keys

Login as the root and type the following command to delete files on your SSHD server:
# /bin/rm -v /etc/ssh/ssh_host_*
Sample outputs:

Step 2 – Debian or Ubuntu Linux Regenerate OpenSSH Host Keys

Generate A New Ssh Key And Delete Old Version

Now create a new set of keys on your SSHD server, enter:
# dpkg-reconfigure openssh-server
Sample output:

You just regenerated new ssh server keys. You need to restart ssh server:
$ sudo systemctl restart ssh
OR
$ /etc/init.d/ssh restart

Step 3 – Update all ssh client(s) known_hosts files

Finally, you need to update ~/.ssh/known_hosts files on client computers, otherwise everyone will see an error message that read as follows:

Either remove host fingerprint or update the file using vi text editor (command must be typed on client machine):
$ ssh-keygen -R remote-server-name-here
Now login using the ssh command:
$ ssh vivek@server1.cyberciti.biz

Conclusion

You just regenerated OpenSSH Host Keys on a Debian or Ubuntu Linux using the dpkg-reconfigure command. For more info see the man page or this wiki page here:
$ man dpkg-reconfigure
$ man sshd

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