Mount the web page to github (super detailed)

First step Log in to Github account, and then create a remote warehouse. Here we name it bird. After creation, copy its ssh URL for standby The second step Enter bird warehouse, selec ...

Posted on Sun, 16 Feb 2020 03:21:52 -0800 by theDog

Hadoop cluster installation

Hadoop cluster installation   Cluster planning   Server Hadoop 101 Server Hadoop 102 Server Hadoop 103 HDFS NameNode DataNode DataNode DataNode SecondaryNameNode Yarn NodeManag ...

Posted on Sat, 15 Feb 2020 07:15:54 -0800 by patrickcurl

Ubuntu 18.10 install DenyHosts to prevent exposed servers from being blasted by malicious ssh

Today, a friend suddenly remembered to see if the server had been blasted by malicious ssh, but he didn't know if it did. There are still a lot of friends like us after checking on github.. A great God has written the plug-in, just use it directly. Originally, I was going to turn off password acces ...

Posted on Sat, 15 Feb 2020 00:19:18 -0800 by katlis

Theory + practice Huawei firewall

Huawei firewall Article directory 1: Huawei firewall product introduction 2: How Firewalls Work 2.1 working mode of firewall 2.2 Huawei firewall security area division 2.3 firewall Inbound and Outbound 2.4 state information 2.5 security strategy 3: Equipment management mode 3.1 AAA (Authenticat ...

Posted on Mon, 10 Feb 2020 05:32:34 -0800 by coffejor

Principle of ansible, installation, various modules in detail

What is ansible? Ansible is a new automated operation and maintenance tool. It is developed based on Python and combines the advantages of many operation and maintenance tools (puppet, cfengine, chef, func, fabric). It realizes the functions of batch system configuration, batch program deployment, batch running commands and so on.Ansible is m ...

Posted on Sun, 09 Feb 2020 09:49:02 -0800 by like_php

Host list for ansible, yml syntax, playbook details + operations

Contents of this chapter:inventory host list2. yml grammar3. playbook Details + Operations inventory host list ansible The default host list is/etc/ansible/hosts file //Host lists can be set manually or generated dynamically through Dynamic Inventory //Use FQDN for generic hostname vi /etc/ansible/hosts [webserver] #Square bracket set ...

Posted on Sun, 09 Feb 2020 09:28:59 -0800 by cybercrypt13

python realizes automatic online script

Procedure description: In this program, the package files in the development program server are uploaded to the formal production environment through this script (Note: the production environment and development environment are not interconnected) Basic idea of procedure: Copy the package in the development environment to t ...

Posted on Sun, 09 Feb 2020 07:57:30 -0800 by bombas79

Linux -- Shell multi machine distributing files and executing commands

It's a very practical tool. First, you need to set up ssh password free communication between machines. There are three documents 1.deploy.conf 2.deploy.sh 3.runRemoteCmd.sh Be careful: The three files are all in / home/hadoop/tools Directory; The first column of the deploy.conf configuration file is the host name of the ser ...

Posted on Mon, 03 Feb 2020 08:00:43 -0800 by jd023

An analysis of open daylight in SDN learning

In the previous article, we talked about the basic understanding and installation of ODL. In this article, we mainly talked about the internal use of ODL. The ODL controller is MD-SAL mechanism, and MD represents the service driven by model. This model is simply Yang model. As early as 2003, IETF est ...

Posted on Sun, 02 Feb 2020 05:27:29 -0800 by ReeceSayer

[Python] view all cluster node information at once: number of node cores, physical memory usage, CPU usage, and load.

1. Source document To facilitate my own use, I completed the code, which consists of two parts: Source file: CPU_usage.py Execution file: CPU? Usage.sh (1) CPU_usage.py code # -*- coding:utf-8 -*- from multiprocessing import cpu_count #!/usr/bin/env python import os, time last_worktime=0 last_idletime=0 def get_cpu(): ...

Posted on Fri, 31 Jan 2020 07:23:18 -0800 by pradeepss