Programmer Think

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...