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Example: Sometimes you want to connect to a machine using the same address as a decommissioned one. And guess what? The keys have been decommisioned as well. If you try to SSH into the machine, you'll be prevented with an error such as this: | Example: Sometimes you want to connect to a machine using the same address as a decommissioned one. And guess what? The keys have been decommisioned as well. If you try to SSH into the machine, you'll be prevented with an error such as this: | ||
| − | < | + | <syntaxhighlight lang="bash"> |
| + | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | ||
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ | @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ | ||
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | ||
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Please contact your system administrator. | Please contact your system administrator. | ||
Add correct host key in /home/user/.ssh/known_hosts to get rid of this message. | Add correct host key in /home/user/.ssh/known_hosts to get rid of this message. | ||
| − | Offending RSA key in /home/user/.ssh/known_hosts:3</ | + | Offending RSA key in /home/user/.ssh/known_hosts:3 |
| + | </syntaxhighlight> | ||
This means that key number 3 in your known_hosts file is the offending key and has to be removed. | This means that key number 3 in your known_hosts file is the offending key and has to be removed. | ||
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This is the right way to remove a key from your Known Hosts file (usually ~/.ssh/known_hosts): | This is the right way to remove a key from your Known Hosts file (usually ~/.ssh/known_hosts): | ||
| − | < | + | <syntaxhighlight lang="bash">ssh-keygen -f ~/.ssh/known_hosts -R machine.address</syntaxhighlight> |
You may need to repeat the command using the IP address instead of a network name. | You may need to repeat the command using the IP address instead of a network name. | ||
Edição atual desde as 15h58min de 30 de maio de 2018
Example: Sometimes you want to connect to a machine using the same address as a decommissioned one. And guess what? The keys have been decommisioned as well. If you try to SSH into the machine, you'll be prevented with an error such as this:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX.
Please contact your system administrator.
Add correct host key in /home/user/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/user/.ssh/known_hosts:3
This means that key number 3 in your known_hosts file is the offending key and has to be removed.
This is the right way to remove a key from your Known Hosts file (usually ~/.ssh/known_hosts):
ssh-keygen -f ~/.ssh/known_hosts -R machine.address
You may need to repeat the command using the IP address instead of a network name.
