gensshkey

#!/usr/bin/env bash

# Ensure you have ssh-keygen installed

# Check if an SSH host is provided
if [ "$#" -ne 1 ]; then
	echo "Usage: $0 hostname_or_user@hostname"
	exit 1
fi

SSH_HOST=$1 # SSH host provided as an argument

# Check if SSH_HOST contains '@'
if [[ $SSH_HOST == *"@"* ]]; then
	SERVER_NAME=$(echo "$SSH_HOST" | cut -d '@' -f 2) # Extract server name after '@'
else
	SERVER_NAME=$SSH_HOST # Use the SSH_HOST as the server name
fi

KEY_NAME=id_rsa_$SERVER_NAME # Key name based on server name

# Generate a new SSH key without a passphrase in the current directory
ssh-keygen -t rsa -b 4096 -N "" -f "$KEY_NAME"

# Manually copy the SSH key to the server
ssh "$SSH_HOST" "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys" < "$KEY_NAME".pub

echo "SSH key generated and manually copied to $SERVER_NAME"