[Bug 2169] New: command to remove outdated hostkey from known_hosts file wrong

[bugzilla-daemon at natsu.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2169

            Bug ID: 2169
           Summary: command to remove outdated hostkey from known_hosts
                    file wrong
           Product: Portable OpenSSH
           Version: 6.2p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: bjoern at j3e.de

when a host with a non-default port is in the known_hosts file then the
suggested command to remove it does not work:

in known_hosts:

[192.168.42.129]:2222 ssh-rsa ....


connecting with an outdated hostkey gives:

Offending ECDSA key in /home/user/.ssh/known_hosts:440
You can use following command to remove all keys for this IP:
ssh-keygen -R 192.168.42.129 -f /home/user/.ssh/known_hosts

That command does only work for this known_hosts entry. It only works
via:

keygen -R [192.168.42.129]:2222 -f /home/user/.ssh/known_hosts

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