This will give you the following output when it is successful: # Host HOSTNAME found: line # /home/user/.ssh/known_hosts updated. This tells which is the offending host, so now you can remove that key by running: ~]ssh-keygen -R HOSTNAME If you look at the error message you will notice this line: RSA host key for has changed. Before you remove the file you should back up the contents: cp ~/.ssh/known_hosts ~/.ssh/known_hosts.old ~]rm ~/.ssh/known_hosts Method 2 - Targeting the Key Individually The file will be recreated the next time you ssh into that computer. If you only have one host in your know_host file then removing the entire file is a solution. If you have a smaller screen the key will continue on to the next line, but is still counted as one line. You will notice the file is arranged: computer name, ip-address veryLongKey, where each line is its own computer and key. It can be opened in a text editor of your choice with: ~]vim ~/.ssh/known_hosts Linux / Mac / Windows with MobaXterm Finding the known_hosts File:Īfter you have connected to a computer using ssh, the key you used to connected is stored in a file called known_hosts which is located in a hidden file (.ssh) in your home directory. This error will occur when the public key the host has changes.To fix this we must remove the key causing the error. The purpose of the known_hosts file is for the client to authenticate the server they are connecting to. Offending key in /home/user/.ssh/known_hosts:1 RSA host key for has changed and you have requested strict checking. Add correct host key in /home/user/.ssh/known_hosts to get rid of this message.
Please contact your system administrator. Sometimes when connecting to a computer with SSH, things can get jumbled up and an error can occur that looks like 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 the RSA host key has just been changed. Warning: Trying to access array offset on value of type null in nodeaccess_node_access() (line 281 of sites/all/modules/nodeaccess/nodeaccess.module).
Warning: Undefined array key "rid" in nodeaccess_node_access() (line 281 of sites/all/modules/nodeaccess/nodeaccess.module).Warning: Trying to access array offset on value of type null in nodeaccess_node_access() (line 280 of sites/all/modules/nodeaccess/nodeaccess.module).Warning: Undefined array key "rid" in nodeaccess_node_access() (line 280 of sites/all/modules/nodeaccess/nodeaccess.module).
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