#!/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.csv"

# Create directory if not exists

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

# Capture general system information

HOSTNAME=$(hostname)

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

CPU_USAGE_VMSTAT=$(vmstat 1 2 | tail -1 | awk '{print $13+$14}')

MPSTAT_OUTPUT=$(mpstat -P ALL 1 1)

IOSTAT_OUTPUT=$(iostat -c 1 1)

PROC_STAT=$(cat /proc/stat | grep '^cpu ' | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage}')

DISK_USAGE=$(df -h)

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

UPTIME_P=$(uptime -p)

UPTIME_S=$(uptime -s)

LOAD_AVG=$(uptime | awk -F'load average:' '{ print $2 }')

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

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

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"

print_header "Top 5 Memory-Consuming Processes"

echo "PID,Memory (%),Command"

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

echo "$pid,$mem,\"$(echo "$cmd" | cut -c 1-1000)\""

done

echo "*****"

print_header "Top 5 CPU-Consuming Processes"

echo "PID,CPU (%),Command"

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

echo "$pid,$cpu,\"$(echo "$cmd" | cut -c 1-1000)\""

done

echo "*****"

print_header "Additional System Information"

echo "Metric,Value"

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

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

echo "Memory Usage,$MEMORY_USAGE"

echo "System Uptime and Load Average,\"$(uptime)\""

echo "TCP Connections,$TCP_CONNECTIONS"

echo "Running Processes,$RUNNING_PROCESSES"

# 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 "Filesystem,Size,Used,Available,Use%,Mounted on"

df -h | awk 'NR>1 {print $1 "," $2 "," $3 "," $4 "," $5 "," $6}'

echo "Uptime (Human-Readable),$UPTIME_P"

echo "System Start Time,$UPTIME_S"

} | 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'. ' | awk '{print $1 "," $2 "," $3}'

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

echo "PID,CPU (%),Command" >> "$OUTPUT_FILE"

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

echo "$pid,$cpu,\"$(echo "$cmd" | cut -c 1-1000)\""

echo "$pid,$cpu,\"$cmd\"" >> "$OUTPUT_FILE" # Save full command to file in CSV format

done

print_header "End of Report"

echo "Detailed information saved to: $OUTPUT_FILE"

# Prompt to send the file via email

ORIGINAL_USER=$(who | head -n 1 | awk '{print $1}')

USER_EMAIL="${ORIGINAL_USER}@xyz.com"

read -p "Do you want to send the report to your email address ($USER_EMAIL)? (y/n): " SEND_EMAIL

if [[ $SEND_EMAIL == [Yy]* ]]; then

echo "Sending report to $USER_EMAIL..."

mail -s "CPU Utilization Report" -a "$OUTPUT_FILE" "$USER_EMAIL" <<< "Please find the attached CPU utilization report."

echo "Report sent to $USER_EMAIL."

else

echo "Report not sent."

fi