btop

btop is a highly polished, terminal-based system resource monitor (TUI) for Linux, macOS, and FreeBSD.

Written in C++ as the performance-focused successor to bashtop and bpytop, it provides a visually striking, interactive dashboard for tracking system metrics with very low overhead.

Key features include:

• Comprehensive Metrics: Detailed, customizable graphs for CPU (per-core), memory, disks, and network usage.

• Process Management: An interactive process list with tree views and filtering, allowing you to easily sort processes and send signals (like SIGKILL) directly from the UI.

• Advanced TUI UX: Full mouse support, custom themes, and an interface that maximizes the visual capabilities of modern terminal emulators.

Essentially, it is a modernized, heavy-duty alternative to htop or top wrapped in a highly customizable terminal interface.