What you are requesting is described as computing the Wallet Import Format for that private key:
Using your example:
1.) Take a private key (Below is the HEX representation of binary value)
2.) Add a 0x80 byte in front of it
While the symbol was part of the Unicode 10.0 release, many fonts still don't have the symbol as part of their character set. You need to install a font that includes the symbol to make it show up.
One such font is GNU Unifont Glyphs. After installing the package unifont, the symbol shows up in the console and browser for me.
Corollary, many Linux ...
CPU mining is no longer supported. See CGMiner FAQ:
Q: What happened to CPU mining?
A: Being increasingly irrelevant for most users, and a maintenance issue, it is
no longer under active development and will not be supported. No binary builds
supporting CPU mining will be released. Virtually all remaining users of CPU
mining are as back ends for illegal ...
When building the source use:
./configure --enable-cpumining && make
At the end of the configure stage you will see a list of what has been enabled, like this:
Configuration Options ...
There are several options for Mining Bitcoins some of these are no longer profitable, but for the sake of being thorough here they are in order of efficiency lowest to highest:
CPU Mining (minerd)
GPU Mining (cgminer, bfgminer)
FPGA Mining (Custom software - https://github.com/fpgaminer/Open-Source-FPGA-Bitcoin-Miner)
ASIC Mining (cgminer, bfgminer,...
Just some thoughts:
As of the time of writing the main net's full blockchain size is 21,670,092,800 bytes, a bit more than 20 GB, that is. So you should have way more disk space that just 20-30 GB.
A Raspberry Pi runs with an SD. SD is known for its limited rewriting capabilities (it's not a heavy duty storage solution, it will bite the dust after a while) ...
Bitcoin has only 8 active connections
Correction: it has 8 outbound connections. By default, it can also accept up to 117 inbound connections
Port 8333, TCP
how should I tell Bitcoin-qt to use the forwarded port?
Don't need to.
You can run a Raspberry Pi with bitcoind no problem. I have several Pi's running bitcoind in various locations and some of them have over 100 connections. Use a 64GB flash card and make sure you have a 512MB swap file. The only limitation you will find is your broadband upload speed , the Pi or it's flashcard will not be the bottlekneck. Use a good quality ...
.exe files are for windows only. Linux systems do not use the same file extension or file type as windows. I assume you just want to create a Linux binary that can be used on all systems without installing all dependencies. To do that, you can use Bitcoin Core's depends system. Instructions are here: https://github.com/bitcoin/bitcoin/tree/master/depends.
did you look at bitcoind?
It does everything you are looking for.
-port= Listen for connections on (default: 8333 or testnet: 18333)
-walletnotify= Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)
-alertnotify= Execute command when a relevant alert is received (%s in cmd is replaced by message)
Direct command-line access via bitcoind is not available any more. You can get access from the command line via the RPC (Remote Procedure Call) API, e.g. with python. The API calls list is found here.
To give a specific example, you can access wallet information via the Python RPC API. Given that the client was booted with rpcuser=user and rpcpassword=pass, ...
If you are after bitcoins I wouldn't even spend time on CPU or GPU. It is now difficult with specialized hardware (butterfly labs, kncminer ... ). You can have a look at cloud mining (cexio) as well it is expensive and you have to have bitcoins already but you can buy and sell GH/s and you can actually make more from trading than mining.
First close your client down and then copy the .bitcoin folder that was created in your home directory to the new location where you wish to store the data. Second create a symbolic link using the new path:
ln -s /new/path/to/.bitcoin .bitcoin
Finally restart the bitcoin client and it will use the blockchain stored at /new/path/to/.bitcoin (or wherever ...
There is a program called CudaMiner that can be compiled to run on Linux.
I've also written some more notes about compiling CudaMiner here
Since this is the first result that pops up on google when searching "bitcoin windows depends build" and the user asked how to build the .exe (but was actually looking for static build instructions on ubuntu) the correct instructions would be to use cross compilation with the depends system as specified in the documentation here: https://github.com/bitcoin/...
There is no need to resolve anything - some miners create arbitrary versions to attempt to speed up the mining process, as it gives them an additional field in the block block header to alter without having to recalculate the merkle root and other fields.
This is harmless, provided they aren't producing invalid blocks for version 2, in which case the block ...
The Linux installer is slightly different to the windows installer in that there are different scripts to get the host machine to recognise the bitcoin URIs.
What ARE very similar is the multibit-exe.jar (used on Linux and Mac) and the multibit.exe (used in Windows). The exe is basically a wrapped jar file.
On any operating system you can run MultiBit jar ...
The following code snippets are taken from the blog post:
It is a great read and you should take a look at it.
import random, keyUtils
#FOR DEMO ONLY.USE A CRYPTOGRAPHICALLY SECURE RANDOM GENERATOR IN PRODUCTION
private_key = ''.join(['%x' % random.randrange(16) for x in range(0, 64)])...
I recommend simply using vanitygen like this:
vanitygen -1 1
This will generate a small number of addresses that you can use, as well as their private keys.
vanitygen is trivial to install on any POSIX system and is proven to work.
Alternatively, you can try bitcoin-bash-tools. Source that from your .bashrc or simply run it, then you can create a new ...
From the description you are giving it sounds like you haven't yet synchronized with the network. Before you can start doing anything useful, e.g., see your current balance, the bitcoind client downloads the entire blockchain and verifies it. This may take quite some time and will likely keep your CPU busy until its done. You can check the progress of the ...
First, you need to compile OpenSSL from the sources. I assume that you've compiled it as it is described in the Bitmessage Forum. That way, OpenSSL including elliptic curves support is installed in /opt/openssl-version. As for the Heartbleed bug that has recently been published, please use the very latest stable version of OpenSSL.
Following this ...
The easiest solution would be to upgrade to the recently released version 0.12.0 which allows running a wallet while in pruning mode (which was not possible with 0.11.2). That way you can limit the required diskspace, still have a fully validating node, and don't need to do update your integration.
After the upgrade to 0.12.0 you just start bitcoind with -...
I recommend reading about the Bitcoin Data Directory. You should also take a look at this answer: How do I specify in which directory Bitcoin blocks and other data should be stored?
Basically, all your Bitcoin data is stored in ~/.bitcoin on Linux. Not only can you specify a different location for this directory using -datadir=/some/other/directory, but ...