Systems | Development | Analytics | API | Testing


Using Tc-Bpf Program To Redirect Dns Traffic In Docker Containers

The adoption of eBPF (Extended Berkeley Packet Filter) has revolutionized high-performance applications, tracing, security, and packet filtering within the Linux kernel. Specifically, TC-BPF, a type of eBPF program attached to the Traffic Control (TC) layer, has emerged as a powerful tool for packet manipulation in both ingress and egress. This blog delves into the practical application of TC-BPF to redirect DNS queries in a Docker environment.

Managing Go Processes

While working on an application that required executing a command to run a blocking program, such as a TCP/HTTP server, I encountered an interesting challenge. I needed a way to stop the application and its child processes when a signal was sent to the main program, such as SIGINT (Ctrl+C) or SIGTERM. This blog post shares my journey and the solutions I found to manage processes effectively in a Go application, focusing on Linux environments.

EBPF, Service Mesh And Sidecar

The operating system is like the boss of your computer, handling security, networking, and keeping an eye on what’s happening. But tweaking or improving the core part of the operating system, called the kernel, is a bit tricky because it’s mainly focused on keeping things stable and secure. Most cool new stuff usually happens outside the core system, in what we call the user space. That’s where people add extra features or functions.

Chat with Devs | Episode 1 - Kernel and Network Tracing with eBPF |

eBPF is the kernel technology for a new generation of networking, observability and security tools. This will give attendees knowledge of how eBPF can be used to trace every action taken on a running system and know what is happening inside the kernel. The main advantage of using eBPF for tracing is that you can access almost any piece of information from the Linux kernel and your applications.

How to Empty, Delete, or Rotate Log Files in Linux?

Do you know that log files in Linux can quickly consume disk space if not managed properly? This can lead to performance issues and even system crashes. Log files? What exactly are they, and why should they matter to anyone using Linux-based systems? Log files are essential components of any Linux-based system. They are text files that contain information about system events, including errors, warnings, and other important messages.

Introducing nsuv

Here at NodeSource we are focused on fixing issues for the enterprise. This includes adding functionality and features to Node.js that are useful for enterprise-level deployments but would be difficult to upstream. One is the ability to execute commands remotely on Worker threads without the addition of running the inspector, such as capturing CPU profiles or heap snapshots.

Top 10 Linux Distros in 2023

‌‌Linux is a free and open-source Unix-based operating system. As a result of Linux's security and flexibility, its use is gaining a great deal of attention these days. A Linux distro is an operating system that relies on the Linux kernel.‌‌ A Linux server or high-end cloud device might be used on a desktop computer or laptop, but on a personal computer or laptop, it can be difficult to use. However, times have changed since then.

Best Android Emulator for Linux - 2023 Edition

On 25th August 1991, a computer-science student in Finland posted the following message on a Usenet newsgroup: “I’m doing a (free) operating system (just a hobby, won’t be big and professional like gnu) for 386(486) AT clones. This has been brewing since April, and is starting to get ready. I’d like any feedback on things people like/dislike in minix, as my OS resembles it somewhat (same physical layout of the file-system (due to practical reasons) among other things).