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The main purpose of setting up master-slave DNS is to share the pressure and redundancy so as to prevent DNS from being parsed properly after the server goes down. Configure master Normally configure DNS services. Setting Host Name [root@localhost ~]# hostnamectl set-hostname master [root@localhost ~]# bash Install the bind package [root@ma ...

rsync is a remote and fast incremental backup tool that supports local, ssh and rsync host synchronization.rsync is one of the basic components of the default Linux/Unix system installation, so we don't need to install it manually. [root@mysql /]# rpm -q rsync rsync-3.0.9-17.el7.x86_64 rsync programs do not have configuration files, so we need ...

SqlHelper.class.php + Fireant Mining System APP develops T:/ I8O.2853.296O V. Vim/Vi has always been the most popular text editor on UNIX/Linux system. Since I came into contact with UNIX in 2001, Vim/Vi has always been my preferred editor for modifying system files and writing simple programs. It is a necessary tool for home travel. How to imp ...

The reason for the error is that the nginx service was not added, so the startup failed. Solution: 1. Create a new file named nginx under / root/etc/init.d / directory Or execute the command in the root directory: vim/etc/init.d/nginx (note that there is a space next to vim)   2. Insert the fol ...

1. Redis Cluster Architecture Details: 1. All Redis nodes are interconnected with each other (PING-PONG mechanism). Binary protocol is used to prioritize transmission speed and bandwidth. 2. Node failure will take effect only when more than half of the master nodes in the cluster fail to detect. 3. Clie ...

The purpose of this chapter is to learn programming specifications, scripting operations and knowledge of variables. I. Overview of Shell scripts II. The Role of Shell Write the first Shell script 1. Write a script (go to the BOOT directory, view the current location, and display all files starting with VML in a long format friendly) [root@ ...

In this highly informationized IT era, production systems, business operations, sales and support, as well as daily management of enterprises are increasingly dependent on computer information and services. The demand for the application of high availability (HA) technology is constantly increasing in order to provide continuous and uninterrup ...

Configuration example: https://blog.51cto.com/14227204/24389021. The working principle and function of keepalived: At first, keepalived was a powerful auxiliary tool designed specifically for LVS. It was mainly used to provide fault switching and health checking functions - to judge the availability of LVS load dispatcher and node server, to i ...

1. Introduction Case - WordCount Requirement: Statistically output the total number of occurrences of each word in a given set of text files 1. Data format preparation Create a new file cd /export/servers vim wordcount.txt Put the following ...

Summary Goang's official package management has been supported since version 1.11. Several attempts have been made before, but the results are not satisfactory, and dep has been used to manage the package. With the release of version 1.13 recently and the increasing number of official management methods using go module, dep has not been develop ...