bmon review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

bmon is an open-source command-line monitoring and debugging tool for system administrators, developers, and other technical users who need current network interface rates and counters. Its interactive curses-based terminal interface presents human-readable statistics, while graphical rate displays help users follow traffic as it changes. The tool supports Linux and macOS, with documented collection through Linux Netlink or a fallback from /proc/net/dev. It is best suited to lightweight, local inspection rather than a broad monitoring platform.

Its strongest fit is flexible output. bmon can display rates in bits per second or bytes per second, and users can configure read and rate intervals to match the task at hand. Programmable ASCII and format output support scripting, while JSON output is available for programmatic consumption. Interface and traffic-control statistics extend the view beyond a single basic counter, making bmon useful for terminal workflows, troubleshooting, and repeatable command-line reporting. Users who value a small, open-source utility with direct terminal access should find this focused scope appropriate.

The trade-off is that bmon stays at the interface and traffic-control layer. It does not provide application monitoring, user monitoring, bandwidth alerts, SNMP monitoring, or historical retention, so it is not designed for attribution, alert-driven operations, long-term trend analysis, or multi-system observability. Teams that need those capabilities should choose a broader monitoring product instead. Pick bmon for real-time terminal visibility, configurable intervals, and machine-readable output; avoid it when the requirement is centralized monitoring, historical reporting, or application-level detail.

bmon pros and cons

• Where it wins
  • Real-time rates with graphical representation in a curses terminal interface
  • JSON, ASCII, and programmable output support scripting and automation
  • Netlink statistics with /proc/net/dev fallback on supported systems
• Where it doesn't
  • No application or user monitoring for attribution beyond interfaces
  • No bandwidth alerts, SNMP monitoring, or historical retention
  • Focused on Linux and macOS rather than broader platform coverage

bmon fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update