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In centos there is a the directive AUTOCREATE_SERVER_KEYS=YES you can put in the /etc/sysconfig/sshd file to tell sshd to re-create its ssh server keys if the keys are missing.

Is there any such way in Ubuntu server 20.04?

Systemgeek
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1 Answers1

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I'm not aware of any equivalent setting.

The Ubuntu/Debian method I usually see suggested to generate missing SSH host keys is the command

dpkg-reconfigure openssh-server

Ubuntu systems with cloud-init by default will use the SSH host-keys module to automatically regenerate host-keys. This module is per-instance, which means it will only run during the first boot.

It might help if you provide the use case for why you need to recreate the SSH host keys.

Andrew Lowther
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