Linux System nfs Service

I. NFS NFS(Network File System (Network File System) is a file system supported by FreeBSD, which allows computers in the network to share resources through TCP/IP network. In NFS applications, local NFS client applications can transparently read and write files on remote NFS servers, just like accessing local files. Composition: The ...

Posted by XeNoMoRpH1030 on Sun, 02 Jun 2019 22:55:09 +0200

Basic Learning of Linux Firewall

Remote Access Control / The two files, etc/hosts.allow and/etc/hosts.deny, control remote access by which a client of an IP/IP segment can be allowed or prohibited to access Linux. sshd:172.25.254. :spawn echo `date` from %c to %s >> /dev/pts/1 iptables Summary: Linux packet filtering software. Three watches and five chains ...

Posted by scraptoft on Sun, 02 Jun 2019 19:40:06 +0200

[Netty] Server and Client

Welcome to Public Number: [Love Programming]If there is a need for background reply to the learning materials given 1T in 2019!! This article is based on Netty 4.1.36 for analysis Server The Netty server startup code is basically as follows: private void start() throws Exception { final EchoServerHandler serverHandler = new EchoServer ...

Posted by Mythic Fr0st on Sun, 02 Jun 2019 18:13:27 +0200

Python 3 crawler scrapy crawl falls in love with the program stored on MongoDB (android module)

Falling in love with Program Network (http://www.aichengxu.com/android) Reason: This website is in the work of Google to find problems, and then found that there are many articles inside, after all, I usually prefer to read technical articles, what I want to understand, what I do not know in-depth, this is not, want to reptile work, is still ...

Posted by ragefu on Thu, 30 May 2019 21:17:55 +0200

Nginx Handbook (V) Static Resources, gzip Compression

I. Relevant Grammar # 1. File reading (whether or not to use the kernel to transfer files) Syntax: sendfile on|off Default value: sendfile off Context: http,server,location,if in location #2,tcp_nopush # Function: Enhance the transmission efficiency of network packets when sendfile is opened. # Explanation: When tcp_nopush on, network packe ...

Posted by scliburn on Wed, 29 May 2019 11:45:55 +0200

RocketMQ Source Learning (III) - Broker (Interaction with Producer)

The way to learn source code this time is to learn source code with problems. The list of problems is as follows. How does Broker receive messages? How to ensure data reliability under Broker exception? How does Broker guarantee high storage throughput? How should Broker message stacking be handled? How does Broker handle timing messages? What ...

Posted by shopphp on Mon, 27 May 2019 21:04:30 +0200

Elastic search 429, logstash does not update kafka queue status

Recently, a new problem has arisen. When using filebeat to load historical log files, a large amount of data will be added to the kafka queue. logstash will read a large number of event s from the queue and send them to the ES side. The initial manifestations are: logstash keeps sending messages to ES, and the data in ES keeps increasing. The ...

Posted by !jazz on Sat, 25 May 2019 20:26:52 +0200

The Use and Introduction of Volley

1. Brief introduction Because it's a brief introduction, there's no complicated explanation here. Volley is a network framework produced by the google method. It was released at the Goolge IO 2013 conference. Now, it can be seen in Android development Training. Training Introduces the Original Address This address needs to be turned over ...

Posted by SQL Maestro on Sat, 25 May 2019 01:56:02 +0200

Loop Judgment of shell Script Advancement

Foreword... 2 I. Conditional Selection and Judgment (if, case). 2 1.1 if statement usage and examples 1.2 case usage and examples II. Circular Sentences... 7 2.1 for cycle... 8 2.2 while cycle... 10 2.3 until cycle * 12 2.4 select cycle... 13 2.5 Cyclic Supplement.. 14 2.5.1 Loop Control Statement continue&break.14 2.5.2 Loop Control Comma ...

Posted by amreiff on Sat, 25 May 2019 01:42:47 +0200

Solving Ajax Cross-domain Problem-JSONP Principle Analysis

Solving Ajax Cross-domain Problem-JSONP Principle Analysis Why are there cross-domain problems? - Because there are homologous strategies Homology is a security policy for browsers. Homology refers to the protocol in the request URL address. Domain names and ports are the same, as long as one of them is different, it is cros ...

Posted by shimano55 on Sat, 25 May 2019 01:19:08 +0200