You can automatically log in to a Linux server on Windows using PuTTY by making use of a key file. Below I explain step by step how to do this. Create a key: start: puttygen.exe Click on: Generate Click on: Save private key Go to PuTTY Configuration -> Session Load a previously created session or create a new one Go to: Connection -> SSH -> Auth -> Private key file for authentication -> Browse Select your file with the private key: *.