OpenSSH /etc/ssh/ssh_host_ed25519_key
Compatibility
File Info
- Size
- 8 lines
- MD5
- f28eab0d7e52d19f0fe86249bf67027c
- SHA256
- 3f2185001620abe7092bb586d7c4cbfe786a2a29ab85b4f9ebf73b8f380c5b47
Quick Commands
curl https://exampleconfig.com/api/v1/config/original/f28eab0d7e52d19f0fe86249bf67027c?hint=ssh_host_ed25519_key
wget -O ssh_host_ed25519_key https://exampleconfig.com/api/v1/config/original/f28eab0d7e52d19f0fe86249bf67027c?hint=ssh_host_ed25519_key
-----BEGIN OPENSSH PRIVATE KEY----- b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW QyNTUxOQAAACCSghvq5sYw2Ost9weaDbDy5yYQRxlE85KJYeaOz5KmNAAAAJjxFRpI8RUa SAAAAAtzc2gtZWQyNTUxOQAAACCSghvq5sYw2Ost9weaDbDy5yYQRxlE85KJYeaOz5KmNA AAAEDJcs6QY/LD7VKooLiUo6Y7mgnsZiTq8HfEFzo87r8aCJKCG+rmxjDY6y33B5oNsPLn JhBHGUTzkolh5o7PkqY0AAAAEXJvb3RAZWQzMThmNDU0YmI0AQIDBA== -----END OPENSSH PRIVATE KEY-----
How to Install OpenSSH
Alpine Linux
sudo apk add openssh-server
Debian
sudo apt update && sudo apt install openssh-server
Red Hat Enterprise Linux
sudo yum install openssh-server
Ubuntu
sudo apt update && sudo apt install openssh-server
Configuration File Location
Complete OpenSSH Configuration Guide
- What is ssh_host_ed25519_key?
- Get the original 'ssh_host_ed25519_key' (sshd_config) configuration file from a fresh OpenSSH installation on Ubuntu 22.04 LTS (Jammy Jellyfish). This is the factory-default SSH server configuration, crucial for security hardening, remote access troubleshooting, and understanding baseline security settings.
- Technical Details
- Located at '/etc/ssh/ssh_host_ed25519_key', this 8-line file controls authentication methods, encryption algorithms, key exchange protocols, and access controls. Secures millions of servers worldwide and is the foundation for secure remote administration, file transfers, and automated deployments.
- Common Configuration Question
- How do you configure OpenSSH for maximum security, key-based authentication, and compliance on Ubuntu 22.04?
- Why Use This Configuration?
- This default configuration includes modern cipher suites, authentication controls, and security best practices. Essential for security professionals, system administrators, and DevOps engineers managing secure remote access to production systems.
Frequently Asked Questions
When should I use this ssh_host_ed25519_key file?
Use this original configuration file when you need to restore OpenSSH to its default state after misconfiguration, during fresh installations, or as a baseline for customization. It's particularly useful for troubleshooting when your current config isn't working properly.
How do I restore OpenSSH to default settings?
Download this file and replace your current configuration at /etc/ssh/ssh_host_ed25519_key. Make sure to backup your existing configuration first, then restart the OpenSSH service to apply the changes.
Is this ssh_host_ed25519_key file secure for production use?
This is the factory-default configuration that ships with OpenSSH on Ubuntu 22.04 LTS (Jammy Jellyfish). While it provides a secure baseline, you should review and customize security settings based on your specific production requirements and compliance needs.
What's the difference between this and other OS versions?
This configuration is specifically from Ubuntu 22.04 LTS (Jammy Jellyfish). Different operating systems and versions may have slightly different default settings, security patches, or feature availability. Check the compatibility section above for other OS versions.
Can I use this configuration file for OpenSSH troubleshooting?
Yes, this original configuration is excellent for troubleshooting. Compare it with your current settings to identify modifications that might be causing issues, or temporarily replace your config with this one to isolate problems.
