/system-health-system-health-checkup

Perform a comprehensive system health checkup:

1. Disk Health (SMART): Check all disk SMART status and health indicators
2. Filesystem Health: Check all mounted filesystems for errors
3. System Resources: CPU, memory, swap, and load status
4. Critical Services: Verify critical system services are running
5. Security Updates: Check for pending security updates
6. Disk Space: Check all mounted filesystems for space issues
7. System Logs: Check for recent critical errors
8. Hardware Errors: Check for hardware-related issues in logs

Run the following comprehensive diagnostic commands:

Disk Health (SMART):

• sudo smartctl --scan to identify all drives
• sudo smartctl -H /dev/sda for health status (repeat for all drives found)
• sudo smartctl -A /dev/sda for SMART attributes (repeat for all drives)
• Check for: Reallocated sectors, Current pending sectors, Offline uncorrectable sectors

Filesystem Health:

• df -h for disk space on all filesystems
• sudo btrfs device stats / if using BTRFS
• Check mounted filesystems with mount | grep -E '^/dev'
• For ext4: sudo tune2fs -l /dev/sdXY | grep -i 'state\|error' for filesystem state

System Resources:

• free -h for memory usage
• uptime for load averages
• top -b -n 1 | head -n 20 for process overview
• swapon --show for swap status

Critical Services:

• systemctl status systemd-journald for logging service
• systemctl status cron or systemctl status crond for task scheduler
• systemctl --failed for any failed services

Updates and Security:

• sudo apt-get update to refresh package lists
• apt list --upgradable to check for available updates
• grep -i security /var/log/apt/history.log | tail -n 20 for recent security updates

System Logs:

• journalctl -p 3 -b for errors in current boot
• journalctl -p 2 -b for critical issues in current boot
• dmesg | grep -i 'error\|fail\|critical' | tail -n 20 for kernel errors

Hardware Status:

• sensors for temperature monitoring (if lm-sensors installed)
• dmesg | grep -i 'hardware error' for hardware errors
• lspci -v | grep -i 'error' for PCIe errors

Additional Checks:

• Check for excessive failed login attempts: sudo grep -i 'failed password' /var/log/auth.log | tail -n 10
• Check for disk I/O errors: dmesg | grep -i 'I/O error'

Analyze all results and provide:

Summary Report:

• Overall system health status (Healthy, Warning, Critical)
• Disk health status for each drive
• Filesystem health and space status
• Memory and swap status
• Any failed services or critical errors
• Pending updates (especially security)
• Temperature warnings if applicable
• Specific issues found with severity levels

Recommendations:

• Immediate actions needed (if any)
• Preventive maintenance suggestions
• Monitoring recommendations
• Whether a reboot is recommended
• Backup reminders if issues detected

Priority Issues: List any issues in order of urgency:

1. Critical (requires immediate attention)
2. Warning (should be addressed soon)
3. Informational (for awareness)

If smartmontools is not installed, offer to install with sudo apt-get install smartmontools. If lm-sensors is not installed and temperature monitoring is desired, offer to install with sudo apt-get install lm-sensors.