This project is a lightweight Bash script designed to provide a quick "health check" of a Linux server. It was created to practice essential Linux administration skills, such as reading system metrics and automating monitoring tasks, which are fundamental for any Cloud/DevOps role.

The script provides a high-level report on three critical areas of the server:

1. Disk Usage: Checks the usage percentage of the root (/) filesystem.
2. RAM Usage: Checks the amount of free (available) memory in Megabytes.
3. Service Status: Checks if a specific, user-defined service (e.g., nginx) is actively running.

It compares these metrics against predefined thresholds and reports an [OK], [UYARI!] (Warning), or [KRİTİK!] (Critical) status for each.

1. (Optional) Open the health_check.sh script and change the variables in the --- Configuration --- section (like DISK_THRESHOLD, RAM_THRESHOLD, SERVICE_NAME) to match your needs.
2. Make the script executable:

   chmod +x health_check.sh

3. Run the script:

   ./health_check.sh

• Bash Scripting (Variables, if/else logic)
• Linux Core Utilities: date, echo
• System Monitoring Commands:
  • df (to check disk usage)
  • free (to check RAM usage)
  • systemctl (to check service status)
• Text Processing: awk, sed (to parse command outputs and extract specific values)