glances

Glances is an open-source, cross-platform system monitoring tool written in Python. It uses the psutil library to collect a wide range of system metrics and presents them in a single, consolidated interface. Glances runs on Linux, Windows, macOS, and other Unix-like systems, and can be used locally or remotely.

The tool provides both a terminal-based user interface that automatically adapts to the display size and a web-based interface via a built-in web server. It can operate in standalone mode to monitor a single machine or in client/server mode to monitor multiple hosts over the network. Data can be accessed live in the UI or retrieved via a REST API and exported as JSON for integration with other monitoring systems.

Metrics include CPU usage, memory and swap usage, load averages, disk I/O and disk space, network activity, and a listing of processes with resource consumption. It also detects sensors such as temperatures where supported. Glances supports configurable refresh rates and can be extended with additional sensors through optional plugins.

Glances is maintained as an open-source project with a community of contributors and is distributed under an open-source license. It is commonly used by system administrators and developers for quick, centralized visibility into system health and performance.