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1. Prepare openssh server Enter the following command to check whether openssh server is installed. If it is installed, the corresponding information will be output [root@sagecat ~]# yum list installed | grep openssh openssh.x86_64 7.4p1-21.el7 @anaconda openssh-clients.x86_64 7.4p1-21 ...

Purpose of interprocess communication Data transfer: one process needs to send its data to another process Resource sharing: multiple processes share the same resources. Notification event: a process needs to send a message to another process or group of processes to notify it (them) of an event (such as notifying the parent process when t ...

In an article CentOS7 installation of MySQL (full version) , explain the process of offline installation of mysql database. This article will explain the master-slave configuration method of mysql database. After the master-slave configuration of mysql database, the backup of database and the separation of read and write can be realized, so as ...

I. hardware environment In Ubuntu 18 The following conditions are required to download and compile the Android 10 (q) source code in the system 1. At least 4G memory, less than 4G memory. Waiting during compiling the source code will be very painful 2. At least 200G hard disk, the larger the better I used a virtual machine in the compilati ...

preface Summarize some commands commonly used at ordinary times, not detailed explanations of commands, but continuous updates 1.nc command nc is short for netcat yum -y insatll nc function (1)Network port connectivity nc -vz -w 1 192.168.1.129 3306 Centos6 nc -w 1 192.168.1.129 3306 </dev/null ...

CentOS 7 firewall policy configuration necessary for operation and maintenance beginners 1. Preface: All distributions above CentOS 7 try to bring their own firewalld firewall, and firewalld brings iptables firewall. The reason is that the firewall policy of iptables is handled by the netfilter network filter at the kernel level, while firewa ...

1,Hadoop data compression compression algorithmOriginal file sizeCompressed file sizeCompression speedDecompression speedBring your ownsegmentationChange proceduregzip8.3GB1.8GB17.5MB/s58MB/syesnonobzip28.3GB1.1GB2.4MB/s9.5MB/syesyesnoLZO8.3GB2.9GB49.3MB/s74.6MB/snoyesyes Input compression: (Hadoop uses the file extension to determine whether ...

What is service registration and discovery Service registration and discovery is an indispensable component in microservice architecture. At first, services are single node, which does not guarantee high availability, and does not consider the pressure bearing of services. Calls between services are simply accessed through interfaces. Unti ...

preface This paper introduces the installation of Kali system and the configuration of Frida environment under Kali system. 1, Basic configuration of Kali environment 1. Download Kali system and open Vmware. Kali official website Download the Vmware version Kali system, unzip it and open it with Vmware.Download the version kali-l ...

A hundred blog series This article is: v66.xx Hongmeng kernel source code analysis (root file system) | file system first attached to / | 51 .c .h .o Relevant articles of the file system are: v62.xx Hongmeng kernel source code analysis (document concept chapter) | why do you say everything is a document | 51 .c .h .ov63.xx Hongmeng ker ...