# System load average
uptime

# CPU info
cat /proc/cpuinfo | head -20

# Detailed CPU stats
mpstat 1 1 2>/dev/null || top -bn1 | head -15

# Memory usage
free -h

# Memory details
cat /proc/meminfo | head -10

# Swap usage
swapon -s

# Disk space (human readable)
df -h

# Disk usage by directory
du -sh /* 2>/dev/null | sort -hr | head -10

# Disk inodes
df -i

# Top processes by CPU
ps aux --sort=-%cpu | head -15

# Top processes by memory
ps aux --sort=-%mem | head -15

# Running processes count
ps aux | wc -l

# Specific process check
ps aux | grep -E "node|python|docker" | head -10

# Network connections
ss -tunapl | head -20

# Listening ports
ss -ltnp

# Network interface stats
ip -s link

# OS version
cat /etc/os-release

# Kernel version
uname -a

# System uptime
uptime -s

#!/bin/bash
echo "=== System Health Check ==="
echo ""
echo "Uptime: $(uptime -p)"
echo ""
echo "=== Memory ==="
free -h | grep -E "Mem|Swap"
echo ""
echo "=== Disk ==="
df -h / | tail -1
echo ""
echo "=== Top CPU ==="
ps aux --sort=-%cpu | head -6 | tail -5
echo ""
echo "=== Top Memory ==="
ps aux --sort=-%mem | head -6 | tail -5