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What is BTC SegWit and Its Impact on Transaction Fees

ByEric Ma

Segregated Witness (SegWit) is a protocol upgrade for Bitcoin that enhances its scalability and transaction efficiency. Introduced in 2017, SegWit addresses several limitations of the original Bitcoin protocol, including transaction malleability and block size constraints. Understanding SegWit What is SegWit? SegWit stands for “Segregated Witness,” referring to the separation of signature data from transaction data….

CalDAV and CardDAV 101

ByEthan Ainsworth

CalDAV and CardDAV are application layer computer network protocols that enable users to synchronize and manage their calendar (CalDAV) and contact (CardDAV) data across multiple devices and platforms. These open standards protocols leverage the (World Wide Web Distributed Authoring and Versioning) protocol, which provides a framework for users to create, change, and move documents on…

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Release Notes For Linux v2.0

ByTony

This is the release notes for linux release v2.0 (source code: linux-2.0.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines/formatting marks. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. Intro This document contains a list of…

Java update 2019
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What can we expect in Java update 2019?

ByEthan Millar

Java is the most regularly used programming language for the creation of web applications. This high-level programming language develops by the Sun Micro-system. This language was designed for use in the world of internet and known for fastest, secure, and most reliable language of the computing platform. One interesting fact is that Java programmers are…

How to change number of replications of certain files in HDFS?

ByEric Ma

The HDFS has a configuration in hdfs-site.xml to set the global replication number of blocks with the “dfs.replication” property. However, there are some “hot” files that are access by many nodes. How to increase the number of blocks for these certain files in HDFS? You can the replication number of certain file to 10: hdfs…

How to convert a .docx .doc MS Word file to pdf in command line on Linux

ByEric Ma

How to convert a MS Word document file such as .docx and .doc to pdf on Linux using command line tools? Use LibreOffice: libreoffice –headless –convert-to pdf –outdir /path/to/out/dir/ /path/to/doc/docx/file While this LibreOffice answer works, the –headless option still needs as display, even though it does not use it. In otherwords, this option won’t work…

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Statically Linking C and C++ Programs on Linux with gcc

ByEric Ma

Before statically linking you C and C++ programs, you should be aware of the drawbacks of the static linking especially with glibc. There are some good discussions already: with glibc you’re linking static programs which are not really static and some others here and here. That said, you can choose to statically link C and…

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Setting up Stable Xen Dom0 with Fedora: Xen 3.4.3 with Xenified Linux Kernel 2.6.32.13 in Fedora 12

ByEric Ma

This is the latest stable and recommended stable Xen Dom0 solution on Fedora 12. No serious bug found till now and we will fix the bugs by ourselves if some appears. It also works on Fedora 14 as well. It should not be hard to use this solution on other versions of Fedora or other…