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Watch Unix services and resources, alert on failures, and run configured recovery actions.

Expose Unix host hardware and kernel measurements at a Prometheus scrape endpoint.

Inspect Unix-like systems for hardening opportunities

Security wargames with a suggested learning order.

Inspect TCP and UDP connections from a terminal

GPG-encrypted password files managed from a shell

Visualize traffic as hosts and links that change with activity

An FTP server with virtual accounts and optional TLS

A small FTP server for Unix-like and embedded environments

Study computing through C, Unix and machine-level concepts

Edit Python modules in a desktop window, run them in an interactive shell, and debug them with built-in tools.

A modal, configurable text editor for programming and general text work.

Build event-driven applications with a cross-platform asynchronous I/O library.

Connect to remote hosts, transfer files, and create secure tunnels with the SSH protocol suite.

A TAP-compliant test framework for checking Bash scripts and command-line programs.

Monitor service health, performance, and availability across managed datacenter and hybrid workloads.

A self-hosted network monitoring framework that polls device data and turns it into RRDTool graphs.

Support enterprise SSH file-transfer workloads

An iPhone and iPad client for a GPG/Git password store

Normalize text file line endings

Connect sockets, streams and terminals for network diagnostics

A configurable FTP server with a maintained module ecosystem

Research trading decisions with reinforcement-learning experiments

Build and train Python machine-learning models with tensor operations, neural-network layers, and automatic differentiation.