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Featured Video:
Watch on Youtube - [565//0] 184 DIGISOL DG-HR1160M Router - Ralink RT5350F MIPS24KEc 360Mhz SoC ↗

Roadmap - How to become Linux Kernel Developer - Device Drivers Programmer and a Systems Software Expert ↗
Wednesday' 15-Jul-2020
Many viewers and even sometimes my students ask me how I can become a kernel programmer or just device driver developer and so on. So I shot this video (and an add-on video) where I summarized steps and a roadmap to become a full-fledged Linux Kernel Developer.

Linux Kernel Module to Drop Packets captured via netfilter hooks ↗
Wednesday' 15-Jul-2020
Here is my sample Kernel Module to drop packets (i.e sk_buff instance) captured via netfilter hooks. When you want to drop packets in your custom netfilter hooks make sure you never do a manual kfree_skb(skb) API call. Since it is anyway performed once the flow of the code moves out of your kernel module netfilter hook. All you need to do is to return NF_DROP to drop gracefully the desired packet. Here is my detailed video and a sample Linux Kernel module.

Weekly News Digest - Week 02 - July 2020 ↗
Wednesday' 15-Jul-2020
The Linux Channel :: Weekly News Digest - Week 02 - July 2020
> Google is teaming up with Ubuntu to bring Flutter apps to Linux
> Linux kernel developers: This new BLM coding style avoids words like blacklist
> Zstd'ing The Kernel Might See Mainline With Linux 5.9 For Faster Boot Times
> Linux 5.9 To Bring Arm Memory Tagging Extension Support
> Linux Kernel Raising Compiler Build Requirement To GCC 4.9
> Linux Developers May Discuss Allowing Rust Code Within The Kernel
> Premio Unveils Intel 9th Gen Industrial Motherboard For Advanced Embedded And IoT Solutions

CEO, CTO Talk ↗
Wednesday' 15-Jul-2020

Arduino UNO - RO Water Purifier Controller ↗
Wednesday' 15-Jul-2020
Here is a Youtube VLOG of my DIY RO Water Purifier Controller done via Arduino UNO. I want the Arduino UNO to control the RO pump, so that it pumps for a specific duration and stops automatically. This is done via Opto-isolated 4 Channel 5V 10A Relay Board meant for Arduino UNO, Raspberry Pi or similar SoC boards which offers GPIO pins. To this relay I have connected the RO water purifier booster pump which works at 24V DC connected via 220V AC to 24V DC power supply adaptar. I have also connected a small active 5V buzzer to notify the progress and completion as it fills the tank/canister.

AT&T Archives: The UNIX Operating System ↗
Wednesday' 15-Jul-2020

Data-Plane and Control-Plane of a Networking Device ↗
Wednesday' 15-Jul-2020

Tour of my new Home Networking Lab within VirtualBox VM ↗
Wednesday' 15-Jul-2020

PyDelhi + PyData + ILUG-D + Linux Chix meetup mash @ Sarai on 17-Dec-2016 ↗
Wednesday' 15-Jul-2020

Compiling a C Compiler with a C Compilter | Compile gcc with gcc ↗
Wednesday' 15-Jul-2020
The fundamental aspect of a programming language compiler is to translate code written from language to other. But most commonly compilers will compile code written in high-level human friendly language such as C, C++, Java, etc. to native CPU architecture specific (machine understandable) binary code which is nothing but sequence of CPU instructions. Hence if we see that way we should able to compile gcc Compiler source code with a gcc Compiler binary.


Trending Video:
Watch on Youtube - [541//0] OSIDays - 12th Open Source India 2015 Bengaluru - Episode1 ↗

Smart NIC Cards ↗
Wednesday' 15-Jul-2020
NIC Cards (Network Interface Cards) traditionally contain controller chip which takes care of the core aspects, such as packet reception, buffering (till they are read by OS device drivers), etc. But these days increasingly modern NIC cards can perform several CPU Network Offload functions such as packet/frame checksum, etc. Such hardware offload features of modern NIC cards is crucial to process packets and support packet data transfer rates of around 1Gbps, 10Gbps, even 40Gbps and so on. But beyond that such as 100Gbps and so on, at times even a high-end Xeon/ Intel/ AMD processors will struggle if need to support transfer rates of around 100Gbps or beyond (situations like Link Bonding). These are the situations we need what we call as Smart NIC Cards. A Smart NIC card implements most of the network traffic processing on the NIC itself that would necessarily be performed by the CPU (i.e Operating System) in the case of a traditional NIC card.



Recommended Video:
Watch on Youtube - [577//0] 0x186 Linux Kernel net_device - Ethernet Protocol APIs & struct ethhdr data-structure - Part 1 ↗