Deployment files of Ethereum
make: * * [geth] error 1
there is no such directory, or the directory has insufficient permissions
According to the data of okcoin, a well-known digital asset trading platform in China, yesterday, the opening price of Ethereum was 1463.00, the highest price was 1545.00 and the lowest price was 1451.01, closing at 1490.99. The closing price rose by 1.85% and the amplitude was 6.48%. Today, Ethereum opened at 1487.29, basically flat
According to analysts of okcoin, the price has shown signs of strengthening in recent trading days, with the price moving up at the low point of each adjustment. At present, the price is in a high consolidation, most of the time trading in the 1480-1530 range To sum up, the 4-hour moving average system tends to be long, and the MACD index runs in strong regions, so it is more likely that the intraday price will continue to rise after a small adjustment. Focus on 1460 first-line support within the day. If the price stops falling and rebounds near this price, it means that the market is still strong. If it falls below this price, it will weaken, or test 1420 first-line long short watershed againNASDAQ has entered into an agreement with major Swiss stock exchange operators to integrate blockchain into OTC procts and services. According to an application document released by the US Securities and Exchange Commission, NASDAQ, which has been studying blockchain technology since 2015, has reached an agreement with six Swiss Exchange, a subsidiary of six group. It is worth noting that six group is also testing blockchain technology through its SiC securities business line
the SEC document said: "in July 2017, NASDAQ signed an agreement with six Swiss Exchange to implement a solution based on distributed ledger technology for six OTC procts, and further use the NASDAQ financial framework (NFF) to promote the commercialization of blockchain technology
although it is not clear when the OTC solution will be developed and whether the deployment timeline has been formulated, this news is the latest progress of NASDAQ in promoting the commercialization of blockchain
for other blockchain projects of NASDAQ, in May this year, the stock exchange and financial giant Citibank reached a cooperation to jointly carry out blockchain payment research. Earlier, in March this year, NASDAQ revealed that it was providing blockchain technical support for a digital media contract exchange
In addition, NASDAQ also expressed its desire to invest more blockchain start-ups, and plans to invest tens of millions of dollarsNASDAQ is one of the most active exchanges in the field of blockchain in the world. In addition, the London Stock Exchange, the Hong Kong Stock Exchange and the New York Stock Exchange have publicly developed blockchain solutions. Not long ago, the London Stock Exchange, one of the world's four largest exchanges, announced its cooperation with IBM to create a blockchain securities platform for small and medium-sized enterprises. The Hong Kong Stock Exchange also announced the launch of a blockchain private stock exchange in 2018
you can try the following steps:
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the super administrator of root login system
cd /etc/sysconfig/network-scrips/
vi ifcfg-eth0 Use the tab key to complete the command
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after modifying the attribute onboot = no to yes, press ESC and then press: WQ to exit
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and then restart the service to take effect: services network restart
The network configuration files of Ubuntu mainly include: IP address configuration file, host name configuration file and DNS configuration file. The solution is as follows:
1. First check the initial network state
there is no configuration file and ifconfig has no eth0 information (of course, there is no eth1). Please use # ifconfig eth0 up or ifup eth0. If there is no prompt information, it means that the system can recognize the network card eth0, but eth0 does not start the service, otherwise it will prompt that eth0 cannot be found. If this is the case, you can manually create the configuration file / etc / sysconfig / network scripts / ifcfg-eth0 (to create a configuration file, you need root permission or sudo authorization of root to change the sysconfig folder)
without a configuration file, you can't start eth0 through ifup. It depends on whether the network service is started. Enter service network status, If it is closed, please enter service network start to start the network service, and a green OK will pop up at eth0, which means that the network service is successfully started. You can handle the above situation by using ifup, and then manually create a configuration file
if there is no configuration file, you can't start eth0 through ifup, and the network service can't be started (service network start displays red failed, Or there is no eth0 information pop-up at all, only local LO), then you need to check whether the network card is plugged into the machine normally, or whether there is a corresponding driver (this situation is rare, unless you use a very old system version or use a USB external network card)
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.173.27.12
NETMASK=255.255.248.0
[root@iZ259r7h4pfZ ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0|awk -F= '/IPADDR/{print $2}'
10.173.27.12
ubuntu修改IP地址：
vi /etc/network/interfaces
/etc/init.d/networking restart
ifdown eth0
ifup eth0
- the old version is called ethx. This new version has changed its name
- you can use IP add to view the interface name
- hope it can help you, please adopt < / OL >