# Passwordless ssh connection from Windows

## Create and Install SSH Key

First of all, we need to create a new key in the Windows pc (where we start the connection) using:

`ssh-keygen -t rsa`

Don't change the default path or remember where you saved the key, it will be used for the next command. Press enter another two times to avoid using a passphrase (if you don't want it).

After that, if you haven't change the default path, the key will be created into `{USERPROFILE}\.ssh\id_rsa.pub`.

Now, you can usually use the command `ssh-copy-id` for installing the key on the remote host, but unfortunately this command is not available on Windows, so we have to install it using this command:

`type $env:USERPROFILE\.ssh\id_rsa.pub | ssh {REMOTE_HOST} "cat >> .ssh/authorized_keys"`

or if your key is not in the default path:

type `{RSA_KEY_PATH} | ssh {REMOTE_HOST} "cat >> .ssh/authorized_keys"`
and replace the `{RSA_KEY_PATH}` with your RSA path.

Replace `{REMOTE_HOST}` with the remote host IP/Name (like `pi@192.168.0.1`), launch the command, insert the password if required, and the work is done!


## Hosts

### docker-01.home.ramberg.net

`$env:USERPROFILE\.ssh\id_rsa.pub | ssh rcadmin@docker-01.home.ramberg.net "cat >> .ssh/authorized_keys"`

### database.home.ramberg.net

`$env:USERPROFILE\.ssh\id_rsa.pub | ssh rcadmin@database.home.ramberg.net "cat >> .ssh/authorized_keys"`

### backup.home.ramberg.net

`$env:USERPROFILE\.ssh\id_rsa.pub | ssh root@backup.home.ramberg.net "cat >> .ssh/authorized_keys"`


## IMPORTANT!

### SETTING UP `.ssh` FOLDER

If the `~/.ssh` folder is not existing in your remote host, you need to configure them, this is usually done by the command `ssh-copy-id`, but we can not access to this power from Windows! You need to connect to the remote host in ssh and create the `.ssh` directory and the `authorized_keys` file for the first time:

```
ssh {REMOTE_HOST}
Create the .ssh directory:
mkdir ~/.ssh
Set the right permissions:
chmod 700 ~/.ssh
Create the authorized_keys file:
touch ~/.ssh/authorized_keys
Set the right permissions:
chmod 600 ~/.ssh/authorized_keys
```

### NOTE

The `authorized_keys` is not a folder, if you try to create it using `mkdir`, the SSH connection passwordless will not work, and if you debug the ssh on the host, you will notice an error/log similar to:

~/.ssh/authorized_keys is not a key file.

### ADD YOUR SSH KEY ON YOUR AGENT

Run those two lines on your Windows pc to add the created key on your cmd/powershell:

```
ssh-agent $SHELL
ssh-add
```
