Run traceroute upon detecting ping failure

ping_and_trace.sh

#!/bin/bash

# Run this script with the following command:
# while true; do ./ping_and_trace.sh; sleep 1; done

# Set the host to ping
HOST="1.1.1.1"
PING_COUNT=5

# Get current time
CURRENT_TIME=$(date "+%Y-%m-%d %H:%M:%S")

# Run ping and capture output
PING_OUTPUT=$(ping -c $PING_COUNT $HOST)

# Extract packet loss percentage
PACKET_LOSS=$(echo "$PING_OUTPUT" | grep -oE '[0-9]+\.?[0-9]*% packet loss' | grep -oE '^[0-9]+\.?[0-9]*')

# Check if packet loss is greater than 0
if [[ $(echo "$PACKET_LOSS > 0" | bc) -eq 1 ]]; then
    echo "[$CURRENT_TIME] Packet loss detected ($PACKET_LOSS%). Running traceroute to $HOST..."
    traceroute $HOST
else
    echo "[$CURRENT_TIME] No packet loss detected ($PACKET_LOSS%)."
fi