SSH keys come in different formats, with PEM (Privacy Enhanced Mail) and PPK (PuTTY Private Key) being two common ones. Different SSH clients and servers expect keys in specific formats. For instance, PEM is commonly used with OpenSSH on Unix systems, while PPK is the format for PuTTY, a popular SSH client on Windows. Converting between these formats ensures compatibility and seamless connectivity across different platforms. The following guide will show you how easy it is to do this conversion.
Easy: Converting Using PuTTYgen on Windows
- Download and Install PuTTYgen: Get the latest version of PuTTYgen from puttygen.com and install it. This tool is part of the PuTTY suite which is essential for SSH communications on Windows.
Medium Skill: Converting Using PuTTY Tools on RHEL Compliant Systems (RHEL, CentOS, Rocky, Alma etc)
1. Install PuTTY Tools: On a Red Hat Enterprise Linux (RHEL) system, you can install PuTTY tools using a package manager. For example, using the command:
sudo yum install putty
On Debian based systems such as Ubuntu
sudo apt-get install putty-tools
2. Convert Using Command Line: Use the
puttygen command to convert the PEM file. For example:
puttygen id_rsa.pem -O private -o id_rsa_private.ppk
This guide provides a straightforward process for converting SSH keys between PEM and PPK formats using PuTTYgen on Windows and PuTTY tools on RHEL and Ubuntu-based Linux systems. Understanding these methods is crucial for ensuring compatibility across different SSH clients and platforms.
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