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2022-09-28

SSH Purge host from known_hosts file

When the host key of a computer you want to ssh to has changed for a valid reason, ssh will block attempts to connect to it to avoid man-in-the-middle attacks. Deleting the key from the known_hosts file with an editor can be annoying, especially if the files is "hashed". Therefore, ssh-keygen offers a feature to do that: 

ssh-keygen -R hostname



en shorterhacks ssh

The series Shorter Hacks consists of tips and tricks for Linux nerds. Flags, hacks, and features of everyday tools that you might not know already, but that will enrich your life. I currently have a list of around 40 hacks I collected and plan to publish them roughly weekly. In order for this series to continue, please send me your best trick(s). The focus is not on fancy new tools or extensive rc-file content, but little known features in software most people already use. Send them to michael bei schoenitzer punkt de.
This blog has an Atom-Feed and I plan to also post the Shorter Hacks articles on Mastodon and Twitter.

Creative Commons License "Shorter Hacks 17 SSH Purge host from known hosts" by Michael F. Schönitzer is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.