Programmer Think

LAMP="Linux Apache Mysql PHP/Python" Linux is often referred to as a system, and there is no explicit version, such as CentOS/Ubuntu/Debian, which can be used as a server system. Apache is the engine of Web parsing, which is used to process Web source files into browser convertible page files. MySQL database, MySQL is a relational database ...

Environment and Software centos7 elasticsearch 7.4.0 Because ES7 already has the JDK version of the required java built-in, the java installation is not introduced here. ES7 installation mode uses RPM installation mode. es node list ip Node name 192.168.1.100 es-node-master-01 192.168.1.101 es-node-master-02 192.168.1.102 es-node-mas ...

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 ...

Yum is more convenient than rpm. The biggest advantage of the yum tool is that it can download the required RPM packages online and install them automatically. If the RPM packages to be installed depend on each other, the yum tool will help us instal ...

Hisry commands are available on both inux and unix to query the history of previously executed commands However, this record does not contain a time item So you can only see commands, but you don't know when to execute them Here's how history records time: Step 1: Check to see if your system supports it Note: This method is only valid for bash ...

Script description1. Script 1: Solution to reload a large number of library files2. Script 2: Select and switch to the working directory you want to switch Script 1 explains: One employee's centos7 host system had the following problems: implement ldconfig The following error occurred in command time: the library files are empty and the length ...

This article is based on CentOS7 environment using rpm package installation.ELK's default logging can grow significantly, with the exception of Elastic Search, and long runs can have catastrophic consequences (such as node downtime).This is the main problem we are facing today.The main strategy is to limit the total number of logs: time + size ...

1. Basic knowledge: Group replication model: Single master model: automatically elect a master node from many MySQL nodes in the replication group, only the master node can write, and other nodes Automatically set to read only Multi-master model: Any node in the replication group can be ...

1. Configuration file [root@es1 ~]# grep '^[a-zA-Z]' /etc/elasticsearch/elasticsearch.yml cluster.name: xing-application node.name: node-1 path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch network.host: 0.0.0.0 cluster.initial_master_nodes: ["node-1"] http.cors.enabled: true http.cors.allow-origin: "*" discovery.seed_hosts: ...

One of the most common problems in Travelling is that the site is slow or inaccessible, and what you see on the server is that the site is CC***.CC*** is one of the DDos*** types, and ** users use a large number of "chickens" to initiate requests to the site they are targeting, which is so frequent that the servers of the site they a ...