rsa-key-deployer

A Python script that deploys your local RSA public key to one or more remote servers in parallel over SSH. Once deployed, you can log in to each server without a password.

Requirements

• Python 3.10+
• paramiko

Install dependencies:

pip install paramiko

Setup

1. Copy the example config file and fill in your server details:

cp servers.example.json servers.json

2. Edit servers.json with the host, port, user, and password for each target server.

3. Make sure you have an RSA key pair at ~/.ssh/id_rsa.pub. If you do not have one, generate it:

ssh-keygen -t rsa -b 4096

Usage

python index.py

The script connects to all servers concurrently and appends your public key to /root/.ssh/authorized_keys on each one. Example output:

[OK] 192.168.1.10
[OK] 192.168.1.11
[FAIL] 192.168.1.12 - Authentication failed.

Config format

servers.json is a JSON array where each object describes one server:

[
    {"host": "192.168.1.10", "port": 22, "user": "root", "password": "yourpassword"},
    {"host": "192.168.1.11", "port": 22, "user": "root", "password": "yourpassword"}
]

Notes

• The script is idempotent. Running it multiple times will not duplicate the key.
• After writing the key, permissions are set to 700 on ~/.ssh and 600 on authorized_keys.
• Deployment tasks run in parallel using a thread pool, so large server lists complete quickly.