Ethereum server shutdown

1. Ethereum is not a kind of currency, but a decentralized intelligent protocol. It can be understood as a huge global account book. The logic of this intelligent protocol does not need a specific server to support its daily operation. Instead, it is the protocol terms given by the executors before entering among the scattered users. This is an application evolved from decentralization
compared with bitcoin, we can find that Ethereum is more difficult to develop a new encryption technology than bitcoin. This breakthrough has greatly reced the development cost and time for developers who apply blockchain technology. The emergence of Ethereum once again reiterated the need to split the center, as well as the feasibility and advantages of decentralized distributed applications, to the existing economic market, the financial sector a new direction of development and throw to the society a new entrepreneurial ideas and opportunities.

2. I plan to start a series to talk about architecture. My previous experience is mainly in the area of Internet architecture. Recently, I am sorting out and analyzing the architecture of bitcoin, Ethereum and EOS, so I am going to write a series of articles to talk about the understanding of Internet architecture and blockchain architecture. It will be divided into four articles: 1. Internet proct architecture, 2. Bitcoin architecture analysis, 3. Ethereum architecture analysis, 4. EOS architecture analysis
there is no central server in Ethereum. Instead, there are many equal nodes connected by P2P protocol, which store all the data in many nodes. When a user initiates a transaction, the transaction will be broadcast out through P2P protocol. The miner node verifies, packages and further broadcasts the transaction to the whole network. After confirmation in the blockchain, the operation is considered to be unchangeable
in the articles on blockchain on the Internet, the two words distributed and decentralized are mentioned, sometimes slightly different, sometimes mixed. The author thinks that if we want to distinguish accurately, the distributed system emphasizes that multiple components work together by sending messages, and the decentralized system emphasizes that there is no central node to control the operation of the whole system. Therefore, we think that Ethereum is both decentralized and distributed, or running a decentralized program on a distributed platform.

3. There is no problem at all, but relatively speaking, we must buy some reliable ones, because we must pay attention to them.

4. The cowhide wallet made by Zhang Zhenyue is very good. I want to make my own handiwork at home. If I don't pay attention to it, I'll buy 0.6cm thick cow leather, directly use ordinary large needles, and just wear more money to sew it

5. If halving leads to greater difficulty in mining, then the reward will surely be higher. Because bitcoin is graally scarce, it will rise. At present, bitcoin on bitoffer is US $9300. If it is halved and doubled, the later theoretical price is US $18600. Let's give it a discount. How can it be US $15000

6. After the network card is configured, the network card can be started and turned off in a variety of ways

1. Service mode: service network start
off: service network stop
2. You can also switch network service here
start network service / etc / init. D / network start
stop network service / etc / init. D / network stop
2 Ifconfig switch NIC
Start: ifconfig eth NIC number up
Close: ifconfig eth NIC number down

7. Usually the server will have multiple network cards, so it has the name eth0 eth1 eth2, and in some systems, the wireless network card will be named WLAN 0 WLAN 1.... Specifically, you can see the directory etc / sysconfig / network scripts. Ifcfg-eth0 represents the configuration of eth0. You change the file to eth1, and the file content is changed to eth1.. Of course, this configuration method is not applicable to all Linux systems, but it is applicable to RHEL------------------------------------------------------------------------------------------ Our own servers usually use two network cards, one for the intranet and the other for the extranet. Why do you do that? 1. From the perspective of security: the flow of the intranet is not constrained, and the flow is uncontrollable. Just like we synchronize files, we will go to intranet traffic, which often causes a sudden increase in traffic. 2. From the point of view of monitoring: distinguish the internal network and external network card to facilitate traffic monitoring.