一、简介
区块链是分布式数据存储、点对点传输、共识机制、加密算法等计算机技术的新型应用模式。 现在区块链技术虽然非常火，但是其真实的应用还很少，几乎没有，现在正是一个区块链技术的一个摸索的阶段，很多人提出区块链应用的领域，但是大都还是刚刚开始去实现，而在区块链技术下的真正的产品还没有出来。它的真正价值也没有展现出来。
二、以太坊
以太坊（英文Ethereum）是一个开源的有智能合约功能的公共区块链平台，通过其专用加密货币以太币（Ether）提供去中心化的虚拟机（“以太虚拟机” Ethereum Virtual Machine）来处理点对点合约。
以太坊是一个平台，它上面提供各种模块让用户来搭建应用，如果将搭建应用比作造房子，那么以太坊就提供了墙面、屋顶、地板等模块，用户只需像搭积木一样把房子搭起来，因此在以太坊上建立应用的成本和速度都大大改善。具体来说，以太坊通过一套图灵完备的脚本语言（EthereumVirtual Machinecode，简称EVM语言）来建立应用，它类似于汇编语言，我们知道，直接用汇编语言编程是非常痛苦的，但以太坊里的编程并不需要直接使用EVM语言，而是类似C语言、Python、Lisp等高级语言，再通过编译器转成EVM语言。
不过其实这里边有一个人也就是以太坊之父：Vitalik Buterin。 小伙非常帅，与我同岁，都是94的，编程界的另一个牛人。
三、以太坊节点
2.1 以太坊客户端
以太坊的两个主要的客户端软件是Geth和Parity。
Geth下载链接:https://geth.ethereum.org/downloads/ Parity下载链接：https://www.parity.io/ethereum/#download
2.2 使用Geth
因为Geth这里提供很多便利的工具，所以这里使用Geth 我这里选择Linux版本，如果是 windows可以直接下载windows版本也是一样的。
我们这里先尝试连接测试网络rinkeby 这里需要注意的是rink
具体创建方式我们可以通过以下网址查看：
geth:https://www.rinkeby.io/#geth
首先下载 :rinkeby.jsonhttps://www.rinkeby.io/rinkeby.json
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我们这里选择轻节点 然后解压geth
1 | tar -zxvf geth-linux-amd64-1.8.17-8bbe7207.tar.gz |
然后切换到geth-linux-amd64-1.8.17-8bbe7207目录下执行以下命令 1
2
3geth --datadir=$HOME/.rinkeby init rinkeby.json
nohup ./geth --rinkeby --datadir=$HOME/rinkeby --syncmode=light --rpc --rpcapi personal,db,eth,net,web3,web,admin --ethstats='yaxuSong:Respect my authoritah!@stats.rinkeby.io' --rpccorsdomain "*" --rpcaddr "0.0.0.0" >> geth.log 2>&1 &
我使用 nohup 后台执行，然后可以查看 geth.log，查看启动结果
1 | tail -fn 400 geth.log |
我们可以通过https://www.rinkeby.io/#stats查看自己的节点是否连接上了
四、参考链接