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1. iptables basic management 1.1 problems This case requires you to practice the use of iptables command and complete the following tasks as required: Close firewalld and start iptables serviceView firewall rulesAppend and insert firewall rulesDelete and clear firewall rules 1.2 scheme iptables firewall has 4 tables and 5 chains, 4 t ...

Case 1: Shell Basic Applications 1.1 Question This case requires familiarity with the features of the Linux Shell environment and focuses on the following: Switch user's Shell environmentPractice command history, command aliasesRedirect Standard Input/Output/Error OutputPipeline Operation Practice Step 1.2 The following steps are req ...

docker 1, Consul 1. 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 accesse ...

preface One of the best things about Linux is its multi person and multi task environment. If you are exposed to Linux for the first time, what is the meaning of so many directories and files under Linux? Let me make a summary. 1, Manage user accounts Compared with windows operating system, the functions of user account and group account ...

It's silly to use Alibaba cloud server to set up this hadoop cluster, which wastes me nearly a week. 1. Preparation Prepare three alicloud servers Namenode121.196.224.191Datanode1121.196.226.12Datanode247.96.42.166 Port setting (pit behind) Namenode Open 9000 ports manually through security groups View the private ip address of the Namenode ...

This paper introduces OCFS2 shared cluster file system, how to configure it and how to expand it online.What is OCFS2 file system?OCFS2 is the abbreviation of Oracle Cluster File System Version 2. It is a shared disk file system developed internally by Oracle. It was open source in 2011 and uses GNU GPL protocol.What is a shared disk file syste ...

Mufeng GEE series column It covers ecological environment, satellite remote sensing, climate change and cloud computing. Google Earth Engine series learning notes (I)Google Earth Engine series learning notes (II)Gee scholars visual time series agricultural landscapeSupervised classification of satellite images based on GEE scholars machine le ...

introduction Prometheus' ability to collect and store indicators belongs to two independent components, Prometheus Server and alertmanager (general component). The former is only responsible for generating alarm notifications based on "alarm rules", and the specific alarm operations are completed by the latter. Alertmanager i ...

Chapter I. requirements of tourism reservation process Users can make travel reservations through the following operation process: 1. Click travel reservation on the home page of the mobile terminal, and the page will jump to the package list page 2. Click the package to be reserved on the package list page, and the page will jump to the p ...

1, Zabbix 1. Necessity of monitoring system As an O & M, you need to be able to use the monitoring system to view the server status and website traffic indicators, and use the data of the monitoring system to understand the results published online and the health status of the website. 2. Function of monitoring software With an ex ...