📜Bash Script to Log Packet Loss via mtr⚗️

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#!/bin/bash # Ensure the script is run with a target IP/hostname as an argument if [ -z "$1" ]; then echo "Usage: $0 <target>" exit 1 fi # Variables TARGET=$1 # Get target from the command line PING_COUNT=200 ITERATIONS=1000 LOSS_THRESHOLD=${2:-2} # Packet loss threshold, default is 2% if not provided DAY_OF_WEEK=$(date +%A) # Get the current day of the week (e.g., Monday) LOG_FILE="/tmp/mtr_report_${TARGET}_${DAY_OF_WEEK}.log" # Log file in /tmp directory # Function to check packet loss of the last hop and log the full mtr report if necessary check_packet_loss_or_path_change() { # Run mtr and capture the full output MTR_OUTPUT=$(mtr -r -c $PING_COUNT $TARGET) echo "$MTR_OUTPUT" # Extract the packet loss percentage of the last hop LOSS_PERCENT=$(echo "$MTR_OUTPUT" | tail -n 1 | awk '{print $3}' | sed 's/%//') echo "Actual: $LOSS_PERCENT" echo "Threshold: $LOSS_THRESHOLD" # Extract the previous hop's IP addresses (excluding the last hop) CURRENT_PATH=$(echo "$MTR_OUTPUT" | awk '{print $2}' | head -n -1 | tail -n +2) echo "Path: $CURRENT_PATH" # Check if a path change occurred by comparing the current path with the previous one if [ "$CURRENT_PATH" != "$PREVIOUS_PATH" ]; then PATH_CHANGED=true echo "Path changed!" else PATH_CHANGED=false fi # If packet loss is greater than loss linit, or if there's a path change, log the full mtr report with timestamp if (( $(echo "$LOSS_PERCENT > $LOSS_THRESHOLD" | bc -l) )) || [ "$PATH_CHANGED" = true ]; then echo "Logging MTR output." echo "--------------------------------------" >> $LOG_FILE echo "$(date): Packet loss on last hop ($LOSS_PERCENT%) or path change detected" >> $LOG_FILE echo "$MTR_OUTPUT" >> $LOG_FILE echo "--------------------------------------" >> $LOG_FILE fi # Store the current path as the previous path for the next iteration PREVIOUS_PATH=$CURRENT_PATH } # Initialize the previous path as an empty string for the first run PREVIOUS_PATH="" # Main loop to run mtr 1000 times for ((i=1; i<=$ITERATIONS; i++)); do echo "Running mtr iteration $i for target $TARGET..." check_packet_loss_or_path_change done echo "Completed $ITERATIONS iterations of mtr."

📜Bash Script to Log Packet Loss via mtr⚗️

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