Here's a simple Bash script that generates an SSH key pair (if one doesn't already exist) and displays the public key so you can copy it to a remote system for SSH access:

generate_ssh_key.sh

#!/bin/bash

# Set the key file path
KEY_PATH="$HOME/.ssh/id_rsa"

# Check if the SSH key already exists
if [ -f "$KEY_PATH.pub" ]; then
    echo "SSH key already exists at $KEY_PATH.pub"
else
    echo "Generating a new SSH key..."
    ssh-keygen -t rsa -b 4096 -f "$KEY_PATH" -N ""
    echo "SSH key generated."
fi

# Display the public key
echo "Your public SSH key is:"
cat "$KEY_PATH.pub"

# Optional: Copy to remote system (uncomment and edit the line below)
# ssh-copy-id user@remote_host

Instructions:

1. Save this script to a file, e.g., generate_ssh_key.sh.
2. Make it executable: chmod +x generate_ssh_key.sh.
3. Run it: ./generate_ssh_key.sh.