OpenSSH – Secure Shell Suite

OpenSSH is the premier connectivity tool for remote login using the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking, and other attacks, making it essential for secure system administration.

Key Features

• Strong Encryption: Modern cryptographic algorithms
• Port Forwarding: Secure tunneling capabilities
• Key Authentication: Public key-based login
• SFTP: Secure file transfer protocol
• Agent Forwarding: Seamless key management

Installation

Install OpenSSH on Ubuntu:

sudo apt update
sudo apt install openssh-server openssh-client
sudo systemctl enable ssh
sudo systemctl start ssh

Usage Examples

Common SSH operations:

# Connect to remote server
ssh user@hostname

# Generate SSH key pair
ssh-keygen -t ed25519 -C "your_email@example.com"

# Copy public key to server
ssh-copy-id user@hostname

# Create SSH tunnel
ssh -L 8080:localhost:80 user@hostname

Benefits

OpenSSH is the industry standard for secure remote access. Its ubiquity across Unix-like systems and robust security make it indispensable for system administrators.

Download OpenSSH