#!/bin/bash

# Helper function for headers with clear separation

print_header() {

echo

echo "====== $1 ======"

}

# Capture date and time

DATE=$(date '+%Y-%m-%d %H:%M:%S')

TIMESTAMP=$(date '+%Y%m%d_%H%M%S')

OUTPUT_DIR="/tmp/CPU_Utilization"

OUTPUT_FILE="$OUTPUT_DIR/CPU_Utilization_$TIMESTAMP.txt"

# Create directory if not exists

[ ! -d "$OUTPUT_DIR" ] && mkdir -p "$OUTPUT_DIR"

# Capture general system information in parallel

HOSTNAME=$(hostname)

DISK_USAGE=$(df -h) &

CPU_USAGE_TOP=$(top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4}') &

CPU_USAGE_VMSTAT=$(vmstat 1 1 | tail -1 | awk '{print $13+$14}') &

MEMORY_USAGE=$(free -h | grep "Mem:" | awk '{print "Total: "$2", Used: "$3", Free: "$4}') &

UPTIME_P=$(uptime -p) &

UPTIME_S=$(uptime -s) &

TCP_CONNECTIONS=$(ss -t | wc -l) &

RUNNING_PROCESSES=$(ps -e --no-headers | wc -l) &

# Wait for all background processes to finish

wait

# Capture top FIDs after parallel execution

TOP_FID_CPU=$(ps -eo user,%cpu --sort=-%cpu | awk '{cpu[$1]+=$2} END {for (u in cpu) print u, cpu[u]}' | sort -k2 -nr | head -n 5)

{

echo "Report generated on: [$DATE] for Hostname: $HOSTNAME"

echo "*****"

print_header "Top 5 Memory-Consuming Processes"

ps aux --sort=-%mem | awk '{print $2, $4, substr($0, index($0, $11))}' | head -n 6 | while read -r pid mem cmd; do

echo "PID: $pid | MEM: $mem%"

echo "Command: $(echo "$cmd" | cut -c 1-1000)"

echo "*****"

done

print_header "Top 5 CPU-Consuming Processes"

ps aux --sort=-%cpu | awk '{print $2, $3, substr($0, index($0, $11))}' | head -n 6 | while read -r pid cpu cmd; do

echo "PID: $pid | CPU: $cpu%"

echo "Command: $(echo "$cmd" | cut -c 1-1000)"

echo "*****"

done

print_header "Additional System Information"

echo "CPU Utilization (top): $CPU_USAGE_TOP%"

echo "*****"

echo "CPU Utilization (vmstat): $CPU_USAGE_VMSTAT%"

echo "*****"

echo "Memory Usage: $MEMORY_USAGE"

echo "*****"

echo "System Uptime and Load Average: $(uptime)"

echo "*****"

echo "TCP Connections: $TCP_CONNECTIONS"

echo "*****"

echo "Running Processes: $RUNNING_PROCESSES"

echo "*****"

# print_header "Per-Core CPU Utilization"

# echo "$MPSTAT_OUTPUT"

# print_header "Detailed CPU Stats"

# echo "$IOSTAT_OUTPUT"

print_header "Disk Usage (All Mounted Filesystems)"

echo "$DISK_USAGE"

echo "*****"

print_header "Uptime (Human-Readable)"

echo "System has been $UPTIME_P"

echo "*****"

print_header "System Start Time"

echo "System started on: $UPTIME_S"

echo "*****"

} | tee "$OUTPUT_FILE"

echo

print_header "Top 5 FIDs by Total CPU Utilization"

echo "No. FID Total CPU%"

echo "$TOP_FID_CPU" | nl -w2 -s'. '

echo "*****"

echo

read -p "Select an FID by entering the corresponding number: " FID_SELECTION

SELECTED_FID=$(echo "$TOP_FID_CPU" | sed -n "${FID_SELECTION}p" | awk '{print $1}')

print_header "Top 10 CPU-consuming processes for FID '$SELECTED_FID'"

# Display truncated command line for readability and save full command to file

ps -u "$SELECTED_FID" --sort=-%cpu -o pid,%cpu,cmd | head -n 10 | while read -r pid cpu cmd; do

echo "PID: $pid | CPU: $cpu%"

echo "Command: $(echo "$cmd" | cut -c 1-1000)"

echo "*****"

echo "$pid $cpu $cmd" >> "$OUTPUT_FILE" # Save full command to file

done

print_header "End of Report"

echo "Detailed information saved to: $OUTPUT_FILE"