![]() $KeyFile = "$env:USERPROFILE\.ssh\id_rsa. ![]() If no username is supplied using -RemoteUser or the syntax, the user running the command's username will be used. PS> ssh-copy-id -RemoteHost 172.16.1.10 -RemoteUser root -KeyFile C:\users\n8tg\SpecialKeyDir\key.pub ![]() PS> ssh-copy-id -RemoteHost 172.16.1.10 -RemoteUser root PS> ssh-copy-id -i C:\users\n8tg\SpecialKeyDir\key.pub So the remote ssh instance will have a TTY and it will prompt the user-you-for things like host key confirmations.Ssh-copy-id ssh-copy-id 172.16.1.10 -l root Running the local ssh instance with "-tt" causes it to request a PTY for the remote session. When it's non-interactive, it doesn't prompt the user for things like passwords and whether to accept a host key or not. In this case, the remote ssh instance sees that it's running without a TTY and runs non-interactively. Rather than type your password multiple times you can make use of pssh and its -A switch to prompt for it once, and then feed the password to all the servers in a list. you have your 2nd key copied (ssh-copy-id used the ssh-agent transparently to authenticate with the first key). ssh-copy-id -i <2nd-key>.pub Et voil. When ssh is invoked with a command to run on the remote system, by default it runs that command without a TTY. ssh/idrsa.pub email protectedmachine: We have to type our password for the remote machine, and the file is transferred. Step 1 Create the RSA Key Pair The first step is to create a key pair on the client machine (usually your computer): ssh-keygen By default ssh-keygen will create a 3072-bit RSA key pair, which is secure enough for most use cases (you may optionally pass in the -b 4096 flag to create a larger 4096-bit key). Load the 1st key (the one you currently use to log into the remote system) ssh-add <1st-key>.pub Run the ssh-copy-id command and pass the new (2nd) key as a parameter.Except that it's not prompting the user-it's just refusing to connect to the third host. 7 Answers Sorted by: 93 OpenSSH comes with a command to do this, ssh-copy-id. DESCRIPTION ssh-copy-id is a script that uses ssh (1) to log into a remote machine (presumably using a login password, so password authentication should be enabled, unless youve done some clever use of multiple identities). So you'd normally expect ssh to prompt the user whether to continue connecting to the third host. ssh-copy-id is a script that uses ssh (1) to log into a remote machine (presumably using a login password, so password authentication should be enabled, unless youve done some clever use of multiple identities). The ssh instance doesn't have a saved copy of the third host's host key. In the case that you're describing, you're launching ssh on the remote system to connect to a third system. For this to work, you must verify that you have SSH access to the remote machine. Try running ssh with the "-tt" option to request a PTY (pseudo-TTY) for the remote session: ssh -tt "REMOTE=yes HOSTNAME=$n $0 rm -f $0" To get the public key over to your remote machine, use the ssh-copy-id. What am I missing and how to make it work? ssh/known_hosts file is present on a remote node so I can't do ssh-keygen -R. usr/bin/ssh-copy-id: ERROR: Host key verification failed.Īt that moment, no. To use public-key authentication, you will need to ensure that an appropriate user public key is stored on each machine to which you wish to ssh. usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed When you use ssh-copy-id remote, you are copying the user key (identity) as an authorizeduser on the remote machine. But the script that has just run successfully on the source node fails running in the remote ssh session: ssh-copy-id fails with the following error: /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/username/.ssh/id_rsa.pub" When running on the source node, it works properly asking for a confirmation and the remote host's password. The userâs name and the script path are completely the same on the source node and all destination nodes. In row 14, I set and pass the variable REMOTE to skip the code block in rows 10-17 (so the script copies itself only from the source node to others), and the variable HOSTNAME because I found itâs not set in an ssh session. Then, if the REMOTE variable is not set, code in rows 11-16 copies the script to remote nodes (except the node itâs running on, row 12) and runs it there. The code in rows 6-8 works fine copying the ssh key to all nodes other than itself. Hereâs the script: 1 #!/bin/bashĤ nodes=( main worker-01 worker-02 worker-03 )Ä¡4 ssh "REMOTE=yes HOSTNAME=$n $0 rm -f $0" What confuses me is the fact that ssh-copy-id works fine on the node where the script is executed manually but it fails if run remotely in an ssh session. ![]() For this, I wrote a simple bash script which copies itself to other nodes and runs it there. I have a task to copy ssh keys from one node to all others in an array.
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