Registration of Ethereum ENS domain name
Publish: 2021-05-05 20:36:20
1. Eth is a kind of digital token of Ethereum, which is regarded as "bitcoin version 2.0". It adopts the blockchain technology "Ethereum", which is different from bitcoin. It is an open-source public blockchain platform with intelligent contract results, and a resonance network composed of tens of thousands of computers around the world. Developers need to pay eth to support the application. Like other digital currencies, ether currency can be bought and sold on the trading platform
warm tips: the above explanations are for reference only, without any suggestions. There are risks in entering the market, so investment should be cautious. Before making any investment, you should make sure that you fully understand the nature of the investment and the risks involved in the proct. After a detailed understanding and careful evaluation of the proct, you can judge whether to participate in the transaction
response time: December 2, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html
warm tips: the above explanations are for reference only, without any suggestions. There are risks in entering the market, so investment should be cautious. Before making any investment, you should make sure that you fully understand the nature of the investment and the risks involved in the proct. After a detailed understanding and careful evaluation of the proct, you can judge whether to participate in the transaction
response time: December 2, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html
2. Ethereum is a platform and a programming language, which enables developers to build and release the next generation of distributed applications
Ethereum can be used to program, distribute, guarantee and trade anything: voting, domain names, financial exchanges, crowdfunding, corporate management,
contracts and most of the agreements, intellectual property, and smart assets that benefit from hardware integration
Ethereum will use a hybrid security protocol. In the early stage, it will use the proof of work (POW) mechanism to distribute Ethernet currency, and then it will switch to the proof of equity (POS) mechanism. Since the launch, there will be 0.26x every year, that is, 60102216
*
0.26
=
15626576 ether coins will be g up by miners every year. After being converted to POS, the annual output of Ethereum will be reced
English Name: Ethereum / eth
Chinese Name: Ethereum
listed exchanges: 156
issuing time: July 24, 2014
Ethereum can be used to program, distribute, guarantee and trade anything: voting, domain names, financial exchanges, crowdfunding, corporate management,
contracts and most of the agreements, intellectual property, and smart assets that benefit from hardware integration
Ethereum will use a hybrid security protocol. In the early stage, it will use the proof of work (POW) mechanism to distribute Ethernet currency, and then it will switch to the proof of equity (POS) mechanism. Since the launch, there will be 0.26x every year, that is, 60102216
*
0.26
=
15626576 ether coins will be g up by miners every year. After being converted to POS, the annual output of Ethereum will be reced
English Name: Ethereum / eth
Chinese Name: Ethereum
listed exchanges: 156
issuing time: July 24, 2014
3. Ethereum is an open source public blockchain platform with smart contract function. Ethernet provides decentralized virtual machine to process point-to-point contract through its special cryptocurrency
4. "Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain rights and interests between different nodes in the blockchain system. "
I. the meaning of blockchain
in a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data
ENS is Ethereum domain name service, a distributed, open and extensible domain name system based on Ethereum. Some hash addresses used in Ethereum ecosystem are usually very long, such as Ethereum wallet address and swarm file hash address, while ENS domain name system is designed to provide users with short and easy to read domain names. Ens does not grant any trademark or declare any ownership. The domain name application of ENS is a completely decentralized process. The domain name is not obtained through purchase. You need to deposit a certain amount of ether coin in the corresponding registration contract as a deposit for at least one year. In order to avoid garbage and meaningless operation, the process of auctioning domain names includes locking deposit and destroying penalty, trying to ensure that the domain name will be registered by the actual user. The ether money spent in the process will eventually be returned to the successful bidder and destroyed in breach of contract. It will not generate income and is completely non-profit.
I. the meaning of blockchain
in a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data
ENS is Ethereum domain name service, a distributed, open and extensible domain name system based on Ethereum. Some hash addresses used in Ethereum ecosystem are usually very long, such as Ethereum wallet address and swarm file hash address, while ENS domain name system is designed to provide users with short and easy to read domain names. Ens does not grant any trademark or declare any ownership. The domain name application of ENS is a completely decentralized process. The domain name is not obtained through purchase. You need to deposit a certain amount of ether coin in the corresponding registration contract as a deposit for at least one year. In order to avoid garbage and meaningless operation, the process of auctioning domain names includes locking deposit and destroying penalty, trying to ensure that the domain name will be registered by the actual user. The ether money spent in the process will eventually be returned to the successful bidder and destroyed in breach of contract. It will not generate income and is completely non-profit.
5. Constantinople, the next system wide upgrade of Ethereum, is coming to a node near you
Constantinople includes five different Ethereum improvement proposals (EIPs), which were completed on August 31. Once released on Ethereum, these proposals will permanently change the blockchain through a series of new backward compatible upgrades
this means that the nodes of the computer network running the Ethereum software must be updated with the whole system, or continue to run as separate blockchain entities
the system wide upgrade has caused quite a lot of dramatic events in the past, which should be more formally referred to as "hard fork". Most notably, when some users disagree with this change, it may lead to two different versions of the same blockchain running at the same time. At present, if you want to invest in Ethereum, you can trade in the bitnet exchange.
Constantinople includes five different Ethereum improvement proposals (EIPs), which were completed on August 31. Once released on Ethereum, these proposals will permanently change the blockchain through a series of new backward compatible upgrades
this means that the nodes of the computer network running the Ethereum software must be updated with the whole system, or continue to run as separate blockchain entities
the system wide upgrade has caused quite a lot of dramatic events in the past, which should be more formally referred to as "hard fork". Most notably, when some users disagree with this change, it may lead to two different versions of the same blockchain running at the same time. At present, if you want to invest in Ethereum, you can trade in the bitnet exchange.
6. The configuration of the first network card in Linux system
description of ifcfg-eth0 configuration parameters in Linux:
ifcfg-eth0 is in / etc / sysconfig / network scripts,
its configuration is as follows:
device = physical device name
IPADDR = IP address
netmask = mask value
Network = network address
broadcast = broadcast address
gateway = gateway address
onboot = [yes | no]
userctl = [yes | no] (whether non root users can control the device)
bootproto = [none | static | BOOTP | DHCP] (boot) No protocol | static allocation | BOOTP protocol | DHCP protocol)
hwaddr = MAC address
some parameters are not required
the original configuration is as follows:
device = eth0
bootproto = DHCP
onboot = yes
in this case, the NIC is not activated
the modified configuration is as follows:
device = eth0
bootproto = static
broadcast = 192.168.129.128
IPADDR = 192.168.129.2
netmask = 255.255.255.0
Network = 192.168.129.0
onboot = yes
in this way, the network card can be activated every time it is turned on.
description of ifcfg-eth0 configuration parameters in Linux:
ifcfg-eth0 is in / etc / sysconfig / network scripts,
its configuration is as follows:
device = physical device name
IPADDR = IP address
netmask = mask value
Network = network address
broadcast = broadcast address
gateway = gateway address
onboot = [yes | no]
userctl = [yes | no] (whether non root users can control the device)
bootproto = [none | static | BOOTP | DHCP] (boot) No protocol | static allocation | BOOTP protocol | DHCP protocol)
hwaddr = MAC address
some parameters are not required
the original configuration is as follows:
device = eth0
bootproto = DHCP
onboot = yes
in this case, the NIC is not activated
the modified configuration is as follows:
device = eth0
bootproto = static
broadcast = 192.168.129.128
IPADDR = 192.168.129.2
netmask = 255.255.255.0
Network = 192.168.129.0
onboot = yes
in this way, the network card can be activated every time it is turned on.
7.
In the new version of CentOS 7, there is another set of rules for the number of network card. The code number of network card is related to the source of network card
1, eno1: represents the network card built in the main board BIOS
2, ens1: represents the PCI-E network card built in the main board BIOS
3, enp2s0: PCI-E independent network card
4, eth0: if none of the above is used, Then return to the default network card name
ens32, which belongs to the second type, that is to say, the network card is a built-in PCI-E network card
extended data:
PCI network card can not only realize the physical connection and electrical signal matching with LAN transmission medium, but also involve the functions of frame sending and receiving, frame encapsulation and unpacking, medium access control, data encoding and decoding, data caching, etc
PCI-E adopts the point-to-point serial connection which is popular in the instry at present. Compared with PCI and the earlier shared parallel architecture of computer bus, each device has its own special connection. It does not need to request bandwidth from the whole bus, and it can increase the data transmission rate to a very high frequency, reaching the high bandwidth that PCI cannot provide Compared with the traditional PCI bus, which can only realize one-way transmission in a single time cycle, the al simplex connection of PCI-E can provide higher transmission rate and quality, and the difference between them is similar to that between half plex and full plex8.
The solution is as follows:
1. Log in to the Linux system through the user name and password, and modify the IP only under the root user
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