checkRebootRequired

#!/bin/bash

# Extract Hostnames from SSH Config
hosts=$(grep "^Host " ~/.ssh/config | awk '{print $2}')

# Create a temporary file to store outputs
output_file=$(mktemp)

# ANSI Color Codes
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Loop Through Hosts
for host in $hosts
do
    # Using subshell to manage background processes and prevent message intermingling
    (
        # Suppressing known_hosts warnings/errors for cleaner output
        output=$(ssh -o BatchMode=yes -o ConnectTimeout=5 -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $host "if [ -f /var/run/reboot-required ]; then echo 'Reboot Required'; else echo 'No Reboot Required'; fi" 2>/dev/null)
        
        # Check the ssh command exit status
        if [ $? -eq 0 ]; then
            if [[ $output == "Reboot Required" ]]; then
                # Red color for Reboot Required
                echo -e "$host: ${RED}$output${NC}" >> "$output_file"
            else
                # Green color for No Reboot Required
                echo -e "$host: ${GREEN}$output${NC}" >> "$output_file"
            fi
        else
            # Red color for SSH Failed
            echo -e "$host: ${RED}SSH Failed${NC}" >> "$output_file"
        fi
    ) &> /dev/null &
done

# Wait for All Background SSH Calls to Complete
wait

# Output the results
cat "$output_file"

# Remove the temporary file
rm -f "$output_file"

echo "All hosts checked."