Geth Ethereum synchronization node data

1. Build / env.sh go run build / ci.go install. / CMD / geth
make: * * [geth] error 1
there is no such directory, or the directory has insufficient permissions

2. Eth mining mainly uses graphics card to mine. Therefore, you need a PC with the following devices:
graphics card, motherboard, power supply, CPU, memory, hard disk (more than 60g SSD is recommended), extension cable, adapter cable, etc
among them, the graphics card determines the speed of mining, and the motherboard and power supply largely determine the stability of mining machine operation.

3. Generally speaking, undefined index is the exact writing problem in the process of writing. Notice generally prompts for errors that are not directly related to the execution of code, but don't forget that notice sometimes returns some rendant error information

4. How many account addresses can an Ethereum node have at most
A: generally, there is only one account address, otherwise there will be an error! blockchain itself is unique. If there are multiple account addresses on one node, it violates the fundamental principle of blockchain!

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

6. Virtual currency without instrial chain will certainly collapse

7. Ethiopia is located in the northeast of Africa, on the southwest coast of the Red Sea, bordering on Djibouti and Somalia in the East, Sudan in the north and West, and Kenya in the south, covering an area of over 1103600 square kilometers. The coastline of Ethiopia is 1013km long. The territory is mainly mountainous plateau, most of which belong to the Ethiopian plateau. The central and western regions are the main part of the plateau, accounting for 2 / 3 of the whole territory, with an average altitude of 2500-3000m; African roof & quot; It's called "the best of the best"< At the same time, ETH is the country code of the Federal Democratic Republic of Ethiopia in FIFA.