SysMon is a command-line (CLI) system monitoring and alerting tool for Linux, developed using modern C++ (C++17). This project demonstrates advanced C++ concepts, including multithreading, object-oriented design, and direct interaction with the Linux /proc filesystem.

• Real-time Metric Monitoring: Concurrently tracks key system metrics such as CPU usage, memory consumption, and disk I/O rates.
• Multithreaded Architecture: Each core function (metric collection, rule evaluation, UI rendering) runs in a separate thread for a responsive, non-blocking experience.
• Rule-Based Alerting: Generates alerts based on user-defined thresholds in an external configuration file.
• Interactive CLI: Features a continuously updating dashboard and accepts user commands (exit, clear) for interaction.
• External Configuration: System parameters like alert thresholds can be configured via a monitor.conf file without recompiling.

• Language: C++17
• Build System: CMake
• Platform: Linux
• Key Concepts Demonstrated:
  • Concurrency: std::thread, std::mutex, std::condition_variable, std::atomic
  • Object-Oriented Design: Polymorphism, Abstraction, RAII
  • Modern C++: Smart Pointers (std::unique_ptr), STL containers, std::variant, std::optional, std::chrono
  • System Interaction: Parsing data from the /proc virtual filesystem.

• A C++17 compatible compiler (e.g., g++)
• CMake
• git

On Debian/Ubuntu, install with:

sudo apt update
sudo apt install build-essential cmake git

1. Clone the repository:

git clone https://github.com/your-username/SysMon.git
cd SysMon

2. Build the project:

mkdir build && cd build
cmake ..
make

An executable named linux_monitor will be created in the build directory.

1. (Optional) Create a configuration file: In the build directory, create a monitor.conf file to set custom alert thresholds.

Example monitor.conf:

# Alert thresholds
CPU_THRESHOLD = 80.0
MEMORY_THRESHOLD = 75.0
DISK_IO_THRESHOLD = 5120.0 # in KB/s

2. Run the application: From the build directory, execute:

./linux_monitor

3. Available Commands:

• clear: Clears active alerts from the screen.

• exit or quit: Shuts down the application gracefully.

• Ctrl+C: Sends a SIGINT to safely terminate the application.

This project is licensed under the MIT License. See the LICENSE file for details.