Paolo Redaelli personal blog

Category: Software Libero

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FAI – Fully Automatic Installation

FAI is a tool for unattended mass deployment of Linux. It’s a system to install and configure Linux systems and software packages on computers as well as virtual machines, from small labs to large-scale infrastructures like clusters and virtual environments. You can take one or more virgin PC’s, turn on the power, and after a few minutes, the systems are installed, and completely configured to your exact needs, without any interaction necessary.

Sequence diagrams

I neede to draw some sequence diagrams. Many people use presentation software like LibreOffice Impress or drawing software but I’m lazy and slow with those programs. Let’s add that I want to use them in a reveal.js presentation. So I asked DuckDuckGo, discovering https://github.com/denniskniep/reveal.js-plugin-sequence-diagrams which uses https://bramp.github.io/js-sequence-diagrams/. The latter in particular is really a smart…

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Apache NuttX

Apache NuttX is a mature, real-time embedded operating system (RTOS).

 

Apache NuttX

NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 32-bit microcontroller environments, the primary governing standards in NuttX are Posix and ANSI standards. Additional standard APIs from Unix and other common RTOS’s (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).

Useful tools

htmlq, like jq, but for HTML. Uses CSS selectors to extract bits content from HTML files. Mozilla’s MDN has a good reference for CSS selector syntax. jq is a lightweight and flexible command-line JSON processor.