N equivalent to ssh-copy-id with OpenSSH in Powershell

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I'm using PowerShell and have OpenSSH 4.6 installed. I'd like to use ssh-copy-id so I can login using a key without doing through the manual process of copying keys to servers. Is there an equivalent to the linux command ssh-copy-id that can be used or is there a PowerShell script already created somewhere that does this?

Best Answer

I was on similar quest and seems like I've gone a bit overboard. You can find the powershell script here: https://github.com/VijayS1/Scripts/blob/master/ssh-copy-id/ssh-copy-id.ps1

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Ssh-copy-id and duplicates in authorized_keys

How to prevent ssh-copy-id from installing the key when it is already installed?

Write your own script. All ssh-copy-id does is append a line to a file. The following would check for key's existence:

#!/bin/bash
cat ~/.ssh/id_* | ssh "$@" 'mkdir -pm 0700 ~/.ssh &&
    while read -r ktype key comment; do
        if ! (grep -Fw "$ktype $key" ~/.ssh/authorized_keys | grep -qsvF "^#"); then
            echo "$ktype $key $comment" >> ~/.ssh/authorized_keys
        fi
    done'

How to make key installation automatic and transparent when connecting to SSH (without explicit ssh-copy-id?

You cannot, because if the server doesn't have your public key already, it will not know where to get it from, either.

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Ssh-copy-id and duplicates in authorized_keys

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