My internship was under the Emerging Technologies and Incubation group on a project involving gVisor. A co-worker contacted my team about not being able to read the debug symbols of stack traces inside the sandbox. For example, when the isolated process crashed, this is what we saw in the logs:

Check failure stack trace:
@ 0x7ff5f69e50bd (unknown)
@ 0x7ff5f69e9c9c (unknown)
@ 0x7ff5f69e4dbd (unknown)
@ 0x7ff5f69e55a9 (unknown)
@ 0x5564b27912da (unknown)
@ 0x7ff5f650ecca (unknown)
@ 0x5564b27910fa (unknown)

Obviously, this wasn't very useful. I eagerly volunteered to fix this stack unwinding code - how hard could it be?

This project literally makes your web browsing available COMPLETELY OFFLINE. Your browser does not even know the difference. It's literally that amazing. Yes.

Save your browsing, then switch off the net and go to http://localhost:22120 and switch mode to serve then browse what you browsed before. It all still works.

warning: if you have Chrome open, it will close it automatically when you open 22120, and relaunch it. You may lose any unsaved work.

teler was designed to be a fast, terminal-based threat analyzer. Its core idea is to quickly analyze and hunt threats in real time!

Ping, but with a graph.

Comes with the following super-powers:

Graph the ping time for multiple hosts
Graph the execution time for commands via the --cmd flag
Custom colours
Windows, Mac and Linux support

A tool to monitor I/O latency in real time. It shows disk latency in the same way as ping shows network latency.

Homepage: https://github.com/koct9i/ioping/

dog is an open-source DNS client for the command-line. It has colourful output, supports the DoT and DoH protocols, and can emit JSON.

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

DMRconfig example bayern mit analog

DMRconfig is a utility for programming digital radios via USB programming cable. Supported radios:

TYT MD-380, Retevis RT3, RT8
TYT MD-390
TYT MD-2017, Retevis RT82
TYT MD-UV380
TYT MD-UV390, Retevis RT3S
TYT MD-9600
Baofeng DM-1701, Retevis RT84
Baofeng RD-5R, TD-5R
Baofeng DM-1801
Radioddity GD-77
Anytone AT-D868UV
Anytone AT-D878UV
BTECH DMR-6x2
Zastone D900
Zastone DP880
Radtel RT-27D

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:

I wrote a post over the weekend which said a lot about libraries letting people down, and other people becoming overly dependent on them. There was an aside of sorts in there which mentioned teaching people about all of the things to look out for when you're writing to a file on a Unix-ish/POSIX-ish filesystem situation. A friend reached out asking if I had a post talking about that stuff, and near as I can tell, I do not.

That brings us to right now. I will attempt to lay down a few things that I keep in mind any time I'm creating files.