Jun 09, 2018 H ow do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/sshhost. 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? Jul 19, 2013 Your key should start with 'ssh-rsa AAAA.' Save The Public Key On The Server. Now, you need to paste the copied public key in the file /.ssh/authorizedkeys on your server. Log in to your destination server; see How to Log Into Your Droplet with PuTTY (for windows users) If your SSH folder does not yet exist, create it manually. Aug 09, 2018 Generate SSH Keys on Windows 10 with PuTTY. To generate a key pair with the PuTTY key generator, simply run andputtygen.exe click the Generate button in the window that appears. You will be asked to move the mouse and press keys to improve the random number generation at the heart of SSH security.
H
![]() [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. ![]()
Advertisements
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
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
Add Ssh Key To PuttyStep 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 [email protected]
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
ADVERTISEMENTS
Putty Generate Ssh Key For Ubuntu Download
You can generate an SSH key on Windows using the PuTTY SSH client. You can download PuTTY for free from this URL.
To generate a key with PuTTY, you should:
Putty Setup Ssh Key
For more information on how to load the key and connect via SSH using PuTTY, please check this tutorial.
Ubuntu Add Ssh Key
You find this article useful? Click here to learn more about SiteGround web hosting experts and what else we can do for you!
Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |