The key to understanding what all this means it is important first understand the difference between a login shell and a non-login shell. Types of Shells A login shell is when you are logging in remotely to another machine via ssh. You generally need to login. A non-login shell is when you are already logged into… Read More »
Long story short, miners literally search for needles in haystacks. The haystack changes in size every 2 weeks depending on how fast or slow each needle is found. Let’s start from the beginning. What is a node? A node is the bitcoin software that forms the backbone of the bitcoin network. Full nodes contains the entire history… Read More »
By Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, Steven Goldfeder. A wonderful free book in pdf format that explains lots of different concepts very clearly with great examples. If there were “answers” to the exercises at the end of each section it would be been even better. The best part was the way the… Read More »
If you want to connect your raspberry pi to your Mac with a USB to TTY cable, the easiest and quickest way is to visit the Profilic website and grab the right driver. This is assuming your USB to TTL Serial Cable is running a PL2303 chip like this one here: http://www.adafruit.com/product/954. On this page,… Read More »
If you have come across this sha.h not found error on a Mac, it is because Apple dropped support for openssl. Apple deprecated its OpenSSL shared libraries a while back (with OS X 10.7). That’s because OpenSSL doesn’t offer release-to-release binary compatibility, so we can’t update the shared libraries to the latest OpenSSL without breaking… Read More »
Very neat resource and clear explanations with diagrams. https://www.cs.swarthmore.edu/~newhall/cs31/resources/C-structs_pointers.php
At a high level, a bitcoin address comprises of 256 1’s and 0’s pushed through some algorithms to result in a ~34 character string that can be given out to receive funds. That’s the short version. Here is the long version. What does a bitcoin address look like? Here is a sample bitcoin address: “18BgGGrBms3eGCRj2Vvrxso4XzWjJEEMBv” A… Read More »
There is a very subtle difference in the following: int *myarray[10] v’s int (*myarray)[10] The first declaration is interpreted as an array of 10 integers, that are pointers. That is you have 1 array holding 10 pointers that are of type integer. The square brackets have a higher precedence so the myarray[10] gets defined first.… Read More »
Learning about pointers in C is no mean feat. It may seem logical and obvious to the well trained but to the beginner or newbie, it is a challenge and a half. Not only that but trying to find good material on learning about C pointers is tricky as well. There is too much information… Read More »