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Bitcoin Cryptocurrency Mastering Development

Calculate Z from r and s

Can anyone explain me any clearly answer or code in python with examples how we can calculate Z value from r and s and inputs outputs order ?? I search in google and youtube and i not saw any correctly answer i just see scam posts or video in youtube. I tried different methods in […]

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User Help Web Apps

Where do the new images in Google search definitions come from?

I often look words up quickly using Google Search. For example, I might search define:belligerent to quickly get a definition, check my spelling, or find synonyms. Today, for the first time, I noticed strange photos in the box with the definition. (See image below for reference.) The photos shown in the definition box do not […]

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Mastering Development System & Network

Failover cluster of 2+ servers for disasters with only 2+ physical machines

TL;DR: Question in bold below Here http://www.howto-expert.com/how-to-create-a-server-failover-solution/ is an (I assume) old blog post, explaining how to setup 2 server machines (one master and one slave), each located at different geographical locations. The context is about self-hosting a website (+database) service, and make it such that, when master has failed the sanity check (e.g because […]

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Mastering Development System & Network

Install OnlyOffice in Nextcloud

I installed Nextcloud in my Linux VM. When I opened the webserver and performed the installation there I had the option to install only office and the other apps, but the page timed out and I had to reload it. I imagine it must have hung while the browser was loading before it timed out. […]

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Mastering Development System & Network

Load Balancer & Route 53 : DNS address could not be found | AWS & BlueHost

Hello I just wanna ask Currently I have created a load balancer and route 53 In my route 53 I have these records Now I have these name servers registered on my BlueHost (Mydomain provider) Yesterday I just changed the name servers on bluehost based on the requirement of AWS after creating a record set […]

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Linux Mastering Development

How to pass multiple variable to a for loop as a argument in a bash script?

I am new to linux and i am writing a bash script… In the script, I have 2 variables(inside the varibles contents are there). I am trying to pass these 2 varibales in a same for loop and perform some actions. But when i pass 2 varibles in a same for loop, am getting error. […]

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Linux Mastering Development Ubuntu

I originally asked a question here: Is it possible to write special characters using the alt key? but was asked to submit a new question including more info I want to be able to type special characters such as ellipsis, en dash and em dash using the same key combinations as in osx (that is, […]

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Linux Mastering Development Ubuntu

How to enable lcok detect configs in ubuntu

I want to detect deadlocks automatically in ubuntu kernel,so when my program casue kernel to be in deadlock, it will warn me automatically. And documents say that I should enable CONFIG_LOCKDEP and CONFIG_PROVE_LOCKING in .config. However, CONFIG_LOCKDEP and CONFIG_PROVE_LOCKING both depend on CONFIG_DEBUG_LOCK_ALLOC. When I enable these three options and compile, it gives me this […]

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Ask Games Video Games

What is the best enchantment on minecraft

Can someone tell me, what is the best enchantment in Minecraft so I can enchant my items with it? Thanks!

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Linux Mastering Development Ubuntu

COMFAST CF-812AC wireless card not working on ubuntu 20.04 (kernel 5.4.0-28-generic)

It works fine on ubuntu 18.04 but when I updated ubuntu to 20.04 and the wifi not working anymore. The system settings shows ‘no wifi adapter’. I installed rtl8812au driver but no use. dmesg show r8168 is loaded $ dmesg|grep 8168 [ 0.196441] pci 0000:22:00.0: [10ec:8168] type 00 class 0x020000 [ 0.555255] r8168: loading out-of-tree […]