OpenSSH is the implementation of the SSH protocol. OpenSSH is recommended for remote login, making backups, remote file transfer via scp or sftp, and much more. SSH is perfect to keep confidentiality and integrity for data exchanged between two networks and systems. However, the main advantage is server authentication, through the use of public key cryptography. From time to time there are rumors about OpenSSH zero day exploit. This page shows how to secure your OpenSSH server running on a Linux or Unix-like system to improve sshd security.

A set of free fonts with a focus on readability in code, it gives you a very
quick preview so you can easily see what style of font you like.

binenv will help you download, install and manage the binaries programs (a.k.a. distributions) you need in you everyday DevOps life (e.g. kubectl, helm, ...).

Think of it as a tfenv + tgenv + helmenv + ...

Now you can install your favorite utility just by typing binenv install something.

Statistical analysis across multiple runs.
Support for arbitrary shell commands.
Constant feedback about the benchmark progress and current estimates.
Warmup runs can be executed before the actual benchmark.
Cache-clearing commands can be set up before each timing run.
Statistical outlier detection to detect interference from other programs and caching effects.
Export results to various formats: CSV, JSON, Markdown, AsciiDoc.
Parameterized benchmarks (e.g. vary the number of threads).
Cross-platform

SSH continues to be a go-to command line tool for system administrators. These six guides reveal key ways that SSH plays a crucial role in getting the job done.

An open-source guide to help you write better command-line programs, taking traditional UNIX principles and updating them for the modern day.

ASCII art version of xeyes, implemented with ncurses and xterm mouse mode

kb is a text-oriented minimalist command line knowledge base manager. kb can be considered a quick note collection and access tool oriented toward software developers, penetration testers, hackers, students or whoever has to collect and organize notes in a clean way. Although kb is mainly targeted on text-based note collection, it supports non-text files as well (e.g., images, pdf, videos and others).

The project was born from the frustration of trying to find a good way to quickly access my notes, procedures, cheatsheets and lists (e.g., payloads) but at the same time, keeping them organized. This is particularly useful for any kind of student. I use it in the context of penetration testing to organize pentesting procedures, cheatsheets, payloads, guides and notes.

I found myself too frequently spending time trying to search for that particular payload list quickly, or spending too much time trying to find a specific guide/cheatsheet for a needed tool. kb tries to solve this problem by providing you a quick and intuitive way to access knowledge.

In few words kb allows a user to quickly and efficiently:

collect items containing notes,guides,procedures,cheatsheets into an organized knowledge base;
filter the knowledge base on different metadata: title, category, tags and others;
visualize items within the knowledge base with (or without) syntax highlighting;
grep through the knowledge base using regexes;
import/export an entire knowledge base;

Basically, kb provides a clean text-based way to organize your knowledge.

GitHub CLI brings GitHub to your terminal. It reduces context switching, helps you focus, and enables you to more easily script and create your own workflows. Earlier this year, we announced the beta of GitHub CLI. Since we released the beta, users have created over 250,000 pull requests, performed over 350,000 merges, and created over 20,000 issues with GitHub CLI. We’ve received so much thoughtful feedback, and today GitHub CLI is out of beta and available to download on Windows, macOS, and Linux.

With GitHub CLI 1.0, you can:

Run your entire GitHub workflow from the terminal, from issues through releases
Call the GitHub API to script nearly any action, and set a custom alias for any command
Connect to GitHub Enterprise Server in addition to GitHub.com

Endlessh is an SSH tarpit that very slowly sends an endless, random SSH banner. It keeps SSH clients locked up for hours or even days at a time. The purpose is to put your real SSH server on another port and then let the script kiddies get stuck in this tarpit instead of bothering a real server.

Since the tarpit is in the banner before any cryptographic exchange occurs, this program doesn't depend on any cryptographic libraries. It's a simple, single-threaded, standalone C program. It uses poll() to trap multiple clients at a time.

query-json is a faster and simpler re-implementation of the jq language in Reason Native and compiled to binary thanks to the OCaml compiler. query-json, allows you to write small programs to operate on top of json files in a cute syntax:

Crush is an attempt to make a traditional command line shell that is also a modern programming language. It has the features one would expect from a modern programming language like a type system, closures and lexical scoping, but with a syntax geared toward both batch and interactive shell usage.
What features of a traditional shell does Crush retain?

The basic structure of the Crush language resembles a regular shell like bash.

How to invoke commands, pass arguments and set up pipelines are unchanged, as is the central concept of a current working directory. This means that trivial invocations, like ls or find .. | count look the same, but under the hood they are quite different, and nearly everything beyond that is different.

Ilya Grigorik (@igrigorik) Tweeted:
TIL, httpstat: visualizes curl(1) statistics in a way of beauty and clarity -- nifty and instant replacement for my own curl timing script...

GitHub: https://t.co/L1jpopqyyq https://t.co/eNzCQQzDoW https://twitter.com/igrigorik/status/1293380686808662016?s=20
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Pywal is nifty Python-based command line tool that changes the terminal colors based on the colors of that wallpapers.

You can use it to set the wallpaper and you’ll see that the terminal colors change immediately.

ytt (pronounced spelled out) is a templating tool that understands YAML structure. It helps you easily configure complex software via reusable templates and user provided values. Ytt includes the following features:

Structural templating: understands yaml structure so users can focus on their configuration instead of issues associated with text templating, such as YAML value quoting or manual template indentation
Built-in programming language: includes the "fully featured" Python-like programming language Starklark which helps ease the burden of configuring complex software through a richer set of functionality.
Reusable configuration: You can reuse the same configuration in different environments by applying environment-specific values.
Custom validations: coupled with the fast and deterministic execution, allows you to take advantage of faster feedback loops when creating and testing templates
Overlays: this advanced configuration helps users manage the customization required for complex software. For more, see this example in the online playground.
Sandboxing: provides a secure, deterministic environment for execution of templates

Archivy is a self-hosted knowledge repository that allows you to safely preserve useful content that contributes to your knowledge bank.

Features:

If you add bookmarks, their webpages contents' will be saved to ensure that you will always have access to it, in sync with the idea of digital preservation.
Allows you to sync up with Pocket to gather bookmarks from there too.
Everything is a file! For ease of access and editing, all the content is stored in markdown files with yaml front matter.
Extensible search with Elasticsearch and its Query DSL

I apologize to @natoscott and @fasterit who tried to contact me; I understand that forking the project must not have been an easy decision to make, and any response of mine might have made it a little easier.

I want to thank you all of you for taking on this initiative, starting from @afontenot for opening up this topic. I am extremely grateful for all the amazing feedback I've received for htop over the years. This has been by far my most successful project, it has brought me many many great things, and I think it's indeed flattering to see it forked

We've just released htop-3.0.0 with over two years worth of bug fixes
and features. Enjoy!

https://github.com/htop-dev/htop/releases

What's new in version 3.0.0

• New maintainers - after a prolonged period of inactivity
  from Hisham, the creator and original maintainer, a team
  of community maintainers have volunteered to take over
  a fork at https://htop.dev and https://github.com/htop-dev
  to keep the project going.

GLab is an open source Gitlab Cli tool written in Go (golang) to help work seamlessly with Gitlab from the command line.

« usbkill » is an anti-forensic kill-switch that waits for a change on your USB ports and then immediately shuts down your computer.