Linux - Quick RAM Usage Check

#!/bin/bash



# RAM Usage Analysis Script

echo "=== RAM USAGE ANALYSIS ==="



# Total RAM summary

echo -e "\n RAM SUMMARY:"

free -h | grep "^Mem:" | awk '{print "Total: " $2 ", Used: " $3 ", Free: " $4 ", Available: " $7}'



# Top 10 processes by RAM usage

echo -e "\n TOP 10 PROCESSES BY RAM USAGE:"

ps aux --sort=-%mem | head -11 | awk 'NR==1 {print $0} NR>1 {printf "%-8s %5s%% %8s %s\n", $1, $4, $6, $11}'



# Memory usage by category

echo -e "\n MEMORY BY CATEGORY:"

echo "Applications & Services:"

ps aux --sort=-%mem | head -20 | awk 'NR>1 && $4>1.0 {printf "  %-10s %5s%% %s\n", $1, $4, $11}' | head -10



echo -e "\nSystem & Kernel:"

cat /proc/meminfo | grep -E "^(MemTotal|MemFree|MemAvailable|Buffers|Cached|Slab)" | while read line; do

    key=$(echo $line | cut -d':' -f1)

    value=$(echo $line | cut -d':' -f2 | sed 's/kB//')

    case $key in

        "Buffers") echo "  Buffers: $(($value/1024)) MB" ;;

        "Cached") echo "  Cached: $(($value/1024)) MB" ;;

        "Slab") echo "  Slab (kernel): $(($value/1024)) MB" ;;

    esac

done



echo -e "\n QUICK TIP:"

echo "Available RAM includes cached memory that can be freed if needed"

echo "Run 'sudo sync && echo 3 > /proc/sys/vm/drop_caches' to clear caches (requires sudo)"



echo -e "\n=== END ANALYSIS ==="