How to Generate pem file to ssh the server without Password in Linux

ssh by pem file to Access Server

It is a standard procedure, now how to make this work without using password, using just a .pem file?

PEM

PEM or Privacy Enhanced Mail is a Base64 encoded DER certificate.  PEM certificates are frequently used for web servers as they can easily be translated into readable data using a simple text editor.  Generally when a PEM encoded file is opened in a text editor, it contains very distinct headers and footers.

PEM is a widely used encoding format for security certificates. Syntax and content is defined by X.509 v3 standards for digital certificates, defined in IETF RFC 5280 specifications. The main file extensions are .pem, .crt, .ca-bundle. Continue reading