Blockchain and Bitcoin: Overview and Internal mechanics

A webinar was conducted on Blockchain and Cybersecurity connects on 26 Aug 2020 for Aurobindo Institute of Technology.  The webinar primed upon the basics of what blockchain technology is and how it works in the backend. For better assimlation,it was assisted with due simulations.The link is shared above for readers info. The link for the presentation is as below:

https://drive.google.com/file/d/1_IrnZBrI85jH5B2vSkDmgO-YAAbmzd5B/view?usp=sharing

 

Blockchain mechanics and Internals:Webinar link and presentation

A webinar was held on the topic "Blockchain mechanics and Internals" coordinated by Govt Women Polytechnic College,Bhopal on 13th June 2020.The video link is shared above and the presentation link is shared below:

Download presentation link : https://drive.google.com/file/d/1ZHSWGQn-8BAI5oXN6wl8fT96QqnL9Ny2/view?usp=sharing

IETE mid-term symposium on digital forensics and information security : 23 May 2020

IETE mid-term symposium webinar was held on "Digital forensics and information security "on 23 May 2020. A presentation on Blockchain basics was given by me. The link to access the presentation is given below:

Presentation Link: https://www.scribd.com/presentation/463780242/IETE-mid-term-symposium-Cryptocurrencies-and-Cyber-crimes

News Coverage : https://www.aninews.in/news/business/iete-conducts-mid-term-symposium-on-digital-forensics-and-information-security20200523131039/

IETE mid-term symposium: Cr... by Anupam Tiwari

 

Installation Bitcoin core on UBuntu 18.0.4 LTS : Bitcoin Mechanics -1

With this first post special to Bitcoin core,over next few months I intend to do some exploring on the bitcoin mechanics part.This basically means playing with the blocks and blockchain vide few python based scripts.Will start from the installation part followed by other posts on extracting info from bitcoin blockchain. This post basically is straight forward installation with the following commands.Screen shots for info :

Firstly install snapd with the following commands

sudo apt update
sudo apt install snapd

goto https://snapcraft.io/bitcoin-core

 

 click green button install

after this installation of snapd,one single command as follows:

sudo snap install bitcoin-core

The effected screenshots are seen below :

Once installed ,you can check on the terminal...should see three bitcoin applications by tabbing

While the GUI shows as below

When you run for the first time,the GUI notification pops for asking for location of default directory for storing blocks.

Thereafter the blocks start getting downloaded with status of files downloaded visible....

Blocks downloaded status is seen below...this downloading around 287 GB as on date will take time as per download speed available.

The location of the blocks being downloaded will be at /home/bitcoin_scripts/snap/bitcoin-core/common/.bitcoin/blocks where bitcoin_scripts is the user name.

Next post we will see whats inside the block....

How to Install Microsoft office 2007 on Ubuntu 18.04 LTS ?

This post will bring out steps on how to install Microsoft office 2007 or any version upto Office 2016 on a Ubuntu 18.04 LTS. Few of the commands one will require are given below followed by the screenshots of installation steps :

Installing XTERM

sudo apt-get update -y

sudo apt-get install -y xterm

Installing PlayOnLinux which relies on the WINEHQ Project

wget -q "http://deb.playonlinux.com/public.gpg" -O- | apt-key add -

wget http://deb.playonlinux.com/playonlinux_stretch.list -O /etc/apt/sources.list.d/playonlinux.list

sudo apt-get update

sudo apt-get install playonlinux

The related screen shots are enclosed below for reference :

Installing playonlinux...terminal shots

Here we see the Microsoft office 2007 running....

Reset Ubuntu 18.04 LTS to original state

Invariably for Ubuntu users there are times when there is a need felt to get back to the original state of Ubuntu as it was at the time of fresh install.This post shares steps and screen shots to achieve the same with the help of a small tool known as RESETTER.

- Download the same from https://github.com/gaining/Resetter/releases

- After download,just double click the file which is most likely downloaded in the Downloads folder unless otherwise configured.

After double clicking it will take few minutes to install.

After installing just go to the terminal and type sudo resetter

That's all...the above steps have been shown below as screen shots..step wise

The site from where the file to be downloaded named resetter_3.0.0-stable_all.deb

 File seen in the downloads folder

 Double click the same and we get the software install notification window

 Installing after punching password as aksed

 At the terminal type sudo resetter

 There comes the resetter GUI...and u r ready to go

 Thanks

Install "golang-github-gorilla-mux-dev" package :Ubuntu 18.04 LTS

Single line command at terminal

sudo apt-get install -y golang-github-gorilla-mux-dev

 

Install "golang-github-joho-godotenv-dev" package: Ubuntu 18.04 LTS

Single line command

sudo apt-get install -y golang-github-joho-godotenv-dev

Installing GO in Ubuntu 18.04 LTS

M sharing here only the terminal commands for installing GO in Ubuntu 18.04...followed by checking whether it is working or not....

Commands as follows in yellow :

go to https://golang.org/dl/

Download the recent tar...herein it is go1.14.linux-amd64.tar.gz

Further to this untar the same...and move the files to /usr/bin

sudo tar -xvf go1.14.linux-amd64.tar.gz

sudo mv go /usr/local

cd /usr/local/

sudo chown -R root:root ./go

Using gedit or any other vi/vim editor, open the ~/.profile file and append the following lines at the bottom :

export GOPATH=$HOME/go
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin

Save and load the commands vide the following command

source ~/.profile

Now create a new directory

mkdir GOLA

Within this create /src/welcome and within that directory copy and paste the contents of the file below

mkdir -p GOLA/src/welcome && cd GOLA/src/welcome

touch welcome.go

gedit welcome.go 

add the following lines here in this file

package main
import "fmt"
func main() {
    fmt.Printf("welcome to go world\n")
} 

and save above followed by build and running the file

go build

./welcome

message should be displayed welcome to the go world