Linux

Transparent Proxy) Principle: Transparent proxy provides the same functions and services as traditional proxies. Its "Transparency" lies in: The client does not need to specify the address and port number of the proxy server in the browser. The

1. Install OpenLDAPYum install openldap -*Service slapd start 2. DownloadWget http://nchc.dl.sourceforge.net/project/phpldapadmin/phpldapadmin-php5/1.2.3/phpldapadmin-1.2.3.tgz Tar-zxvf phpldapadmin-1.2.3.tgzMv phpldapadmin/var/www/html/ 3.

1) DNS Service EstablishmentUse bind to build the dns Service:Yum install-y bindYum install-y bind-utilsCp/etc/named. conf/etc/named. conf. bak>/Etc/named. confVim/etc/named. conf123456789101112131415 options {Directory "/var/named ";};Zone "." IN

Solutions to java version problems that occur when deploying Tomcat to Ubuntu Exception: Output in Catalina. out: startup failed due to previous errors Output in localhost: unsupported major. minor version 51.0 In the final analysis, it is caused

I. fault symptoms When running a large task, the datanode log reports that DataXceiveServer: Exiting due to: java. lang. OutOfMemoryError: unable to create new native thread is abnormal, and then the DataNode on the computing node is directly

Abstract: Recently, server programs are being debugged and cannot be remotely connected to the server one day or later. Therefore, you can use to detect the status of remote server programs in real time, when the program is down, make sure that we

Recently, I took over the Server System Monitoring Project, the open-source software hyperic-hq, and installed the test environment. Hyperic HQ is an open-source IT management framework that allows users to manage various IT technologies on a

Related support library migration It mainly includes libiconv, zlib, and matrixssll. Download the third-party Toolkit provided by Embedthis and use git to obtain the packages Package from GitHub. The command is as follows. Gitclone http://github.com/

Recently, I used shell to write a script to monitor the haproxy status and record it for later use. 1. First, clarify the requirements. What functions do we need, how do we implement them in the conventional way, and how do we implement them using

Explains what happened to the server-top Tool Before checking the detailed performance status of the server, the system administrator needs to have a general understanding of the current server status. top is a powerful tool for checking the overall

The previous Web Service (I) HTTP basic detailed introduction of the http basic and httpd installation (SEE); this detailed introduction of part of the httpd-2.2 configuration parameters CentOS 6.5 compile and install httpd-2.4.7 1. configuration

This article is followed by an additional article on lzo installation by Hadoop, which mainly describes the problems and solutions encountered during the installation process. Cocould not load native gpl library Exception Stack: 12/11/07 10:15:02

I am a Linux cainiao. I recently used ftp operations in my project, but I am helpless. I have nothing to worry about. I need to start from scratch and search for various Baidu and materials. Finally, the service was set up and accessed

Hadoop includes two cores: distributed storage system and distributed computing system. 1.1.1.1. Distributed Storage Why do data need to be stored in a distributed system? Isn't it possible for a single computer to store the data? Isn't it possible

Cluster Technology Clustering technology is a group of computer systems that provide network resources for clients. Each computer that provides services is called a node. Organize multiple computers to work together to simulate a more powerful

I. I have already introduced the features of haproxy. This article mainly introduces how haproxy achieves Dynamic and Static separation of web applications. The main idea is to define acl access control through frontend segments, requests that meet

When Tomcat is started in Linux, the following error occurs: port already in use, which may cause many reasons. The title does not indicate the specific problem. Here, I will only talk about my operations, the problems encountered and their

The most frequently asked question about the new feature of Twitter Storm: Transactional Topology is: how does Storm know that a Bolt has completed all of its tuple processing? In fact, there are still a lot of things to do. Fortunately, Storm has

In this article, let's take a look at how tuple in Storm goes from one tuple to another. Bolt first calls the emit or emitDirect method of OutputCollector when launching a tuple,The two methods ultimately call the mk-transfer-fn method in the

You can use bin/Hadoop fs-ls to Read File Attribute Information on HDFS. You can also use HDFS APIs to read data. As follows: Import java.net. URI;Import org. apache. hadoop. conf. Configuration;Import org. apache. hadoop. fs. FileSystem;Import org.