Picosnitch – a reliable and lightweight security/privacy tool for Linux

In plain words

Picosnitch is a lightweight security and privacy tool designed for Linux users. It monitors system activity to help users track what processes are accessing their network and other resources. The tool is built to be reliable while using minimal system resources, making it suitable for users who want to maintain visibility into their system's behavior without impacting performance. It's aimed at privacy-conscious Linux users seeking a straightforward way to oversee application network activity.

written from the facts on this page · September 2026

From the sources

Picosnitch is a small userspace daemon built on BPF and fanotify . It notifies you when a new program connects to the network or when one is modified on disk, and keeps a per-executable log of every connection, with sent/received bytes, hashes, parents, domains, ports, and users. Bandwidth and connection counts broken down by executable, parent, domain, port, or user, over a configurable time range. Light and dark themes follow your system preference. picosnitch webui # http://localhost:5100 (override with PICOSNITCH_HOST / PICOSNITCH_PORT) Terminal UI ¶ A curses-based read-only view of the same database, useful over SSH or on headless boxes. Filter by executable, parent, command line,…from elesiuta.github.io

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