Jun 09, 2018 H ow do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/sshhost. /keytool-generate-certificate-from-private-key.html. 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? Dec 07, 2019 SSH is short for Secure Shell.Secure Shell is a network protocol that provides administrators with a secure way (with encryption) to access a remote computer. It allows an administrator to log into virtual space server with an SSH key instead of a typical password.
ow 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?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.
Let us see all steps
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:
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
/cisco-asa-5505-generate-ssh-key.html. 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
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
ADVERTISEMENTS