sudo block

Briefly describe the problem: as the company's servers more and more, personnel mobility is also beginning to grow, the old Management Server should abandon the idea, the company needs to have a better and more perfect authority system, after many

Recently in the research block chain. Plan to build a test environment to start running. The whole construction process is recorded here for up-and reference. Overall, it is divided into three steps to install the relevant software, initialize the

1. Background Sampleblk is a Linux block device drive project for learning purposes. One of the Day1 source code to achieve a minimalist block device driver, the source codes only more than 200 lines. This article mainly revolves around these

Why command not found appears when you add sudo before executing some commands in Linux When we use sudo to execute a CD, LS, and so on, the command not found prompt appears: sudo cd/home/michaelSudo:command not found We know that when you execute

In many cases, you may need to block IP addresses under Linux. For example, as an end user, you may want to be immune from spyware or IP tracking. Or when you're running the peer software. You may want to filter the Internet links for anti-peer

How to block a large number of malicious IP addresses in Linux In many cases, you may need to block IP addresses in Linux. For example, as an end user, you may want to avoid the troubles of spyware or IP tracking. Or when you are running P2P

Blockchain Development (i) building a private chain environment based on the Ethereum Lihe 2016.07.08 Through the methods described in this article and the script, we can quickly set up their own private chain for blockchain development testing,

bit-code Linux environment configuration compile run BitcoinTime: 2017-03-04 Source: Linux Web site Author: mosen_huang Because of the recent learning block chain, need to learn the next Bitcoin source code, so try to compile in Windows

How to block network traffic in Linux based on country location As a system administrator who maintains a Linux production server, you may encounter the following situations: You need to selectively block or allow network traffic to pass through

Reference article address: http://blog.csdn.net/sportshark/article/details/51855007 Build Environment: Ubuntu Specific installation can refer to the official guide: Https://github.com/ethereum/Go-ethereum/wiki/Building-Ethereum One: Enter the