What is ssh?

ssh stands for secure socket layer. It’s basically a way for you to access remote servers in a convenient and safe way.

Steps to copy ssh public key to remote server

1. First if you do not have a key, run the following command in a local terminal / Powershell to generate an SSH key pair:

   macOS / Linux: Run the following command in a local terminal

    ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519-remote-ssh
   

   Windows: Run the following command in a local Powershell

    ssh-keygen -t ed25519 -f "$HOME\.ssh\id_ed25519-remote-ssh"
   

   The -f command saves your ssh to a location

2. Authorize your Windows machine to connect If you’re connecting to a Linux Host, type this command in your powershell:

    $USER_AT_HOST="your-user-name-on-host@hostname"
    $PUBKEYPATH="$HOME\.ssh\id_ed25519.pub
   
    $pubKey=(Get-Content "$PUBKEYPATH" | Out-String); ssh "$USER_AT_HOST" "mkdir -p ~/.ssh && chmod 700 ~/.ssh && echo '${pubKey}' >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"
   

3. Go your .ssh file location and change the SSH config file like so:

    Host name-of-ssh-host-here
        User your-user-name-on-host
        HostName host-fqdn-or-ip-goes-here
        IdentityFile ~/.ssh/id_ed25519-remote-ssh
   

If you want more information on using SSH keys, I highly recommend this webpage