servers work

Performance Analysis and Optimization of CentOS servers As a Linux system administrator, the most important task is to optimize system configuration so that applications can run in the optimal state on the system. However, hardware, software, and network environments are complex and changeable, as a result, the optimization of the system becomes abnormal and complex. How to locate the performance problem is a major problem in performance optimization.

The mail system is an important part of Linux network applications. The complete mail system includes the underlying operating system, the mail sending proxy MTA, the mail distribution proxy MDA, and The Mail User proxy MUA. Currently, the main danger facing the Linux email system is spam, Linux virus, and DoS attacks. This article focuses on Anti-Spam policies for Linux mail servers. Prevention of Spam Currently, the following anti-spam technologies

effectively avoids the use of the email sending proxy server for spam senders, but also facilitates employees who work on a business trip or at home. Without SMTP authentication, it is also feasible to set up an Internet-oriented Web mail gateway without sacrificing security. In addition, if the SMTP service and POP3 service are integrated on the same server, it is safer to perform POP3 access authentication (POP before SMTP) on the SMTP service befo

DHCP server is a powerful server that helps us manage IP addresses. You must be an administrator. DHCP is short for Dynamic Host Configuration Protocol. It is a type of TCP/IP Protocol cluster and is mainly used to assign Dynamic IP addresses to network clients. These allocated IP addresses are a set of IP addresses reserved by the DHCP server in advance, and they are generally consecutive IP addresses. Understanding DHCP Service When using DHCP, you must have a DHCP server on the network, while

Deploying Intranet proxy servers in CentosEnvironment and requirements 10 internal network worker machines, all of which are win7, with the network segment 192.168.1./24, 1 server, and CentOS6 System (dual Nic ). One vro (Dynamic IP, accessing the Internet through the PPPOP account password) and one vswitch with 48 ports. To deploy a CentOS server as a proxy server, the Intranet worker must connect to the network through the server. Analysis: To becom

such as static IO processing do not require the involvement of logic programs (Note 1) · In terms of extensibility, fastcgi is a neutral technical standard that can be fully supported in any language written processing program (Php,java,python ...). 2.apache Apache is the world's number one Web server, according to Netcraft (www.netsraft.co.uk) survey, more than 50% of the world's Web servers are using Apache. In April 1995, the earliest Apache (0.6.

I want to know how casual game servers are built? What is the difference between MMORPG and MMORPG?User Capacity of casual game serversMMORPG games vary based on network structures, resulting in different server architectures.Currently, the architecture of some mainstream MMORPG games is not very different from that of casual games. Take the QQ game upgrade as an example. QQ's upgraded game has established 14 regions, and the number of gamers is expe

From: http://sharepoint.microsoft.com/blogs/fromthefield/Lists/Posts/Post.aspx? List = 0ce77946% 2d1e45% 2d4b43% 2d8c74% 2d21963e64d4e1 id = 60 One of the best practices that the Premier Field Engineering (PFE) team always recommend is to run the central administration Web Application on multiple servers (at least 2) within the farm. then if anything happens to one of the servers hosting Central Administ

"51CTO exclusive feature" How to optimize your Linux production server? This paper summarizes the nine main points of optimizing Linux production server based on the actual work experience. If there are some methods you have not yet adopted, you may wish to try.One, time synchronizationProduction environment server to time requirements is accurate, my mail server Dovecot service, previously often because of the time problem automatically stop service,

Tags: des style http color using OS strong IOAlmost all of the configuration parameters are in the config.inc.php file. If this file does not exist, you can find config.default.php in the Libraries directory, copy it to the root directory, and rename it to config.inc.php. $cfg [Pmaabsoluteuri] string , Fill in the full URL of your PhpMyAdmin installation directory (including the full path) here. Starting with version 2.3.0, you can try not to fill out this parameter. The ph

combines the programming capability of SMP system and the scalability of MPP (large-scale parallel processing) system to better solve the scalability problem of SMP system, it has become one of the mainstream architectures of high-performance servers. At present, famous foreign server manufacturers have successively launched high-performance Servers Based on NUMA architecture, such as HP Superdome, SGI's A

tools are used in the same way on these platforms. Therefore, the development and deployment of QT applications are irrelevant to the platform. In a desktop system, QT is usually an application that complies with the X protocol and requires the support of the X server. QT/E is the QT version used for Embedded Linux systems. The dependencies of X lib are removed from QT/E and directly work on frame buffer. Therefore, the processing efficiency of appli

1. Using DNS Forwarders DNS forwarders are for other DNS servers The DNS server that completes the DNS query. The primary purpose of using DNS forwarders is to mitigate the pressure of DNS processing, to transfer query requests from DNS servers to forwarders and to benefit from DNS forwarders potentially larger DNS caches. Another benefit of using DNS forwarders is that it prevents DNS

, Sbin, Lib, includes, etc, Share/man Let's start by manually configuring Apr and Apr-util and how to install httpd. (Hint: here to download the source package) First step: Install the development environment Step Two: Install the APR source program We're loading it up on our servers, and if you do, go to the official website (apr.apache.org) to download the source package, and here we put it under the home directory. If you don't want to put it h

A Linux operating system-based server runs at the same time, it will also characterize a variety of parameter information. In general, OPS and system administrators are extremely sensitive to these data, but these parameters are also important to developers, especially when your program is not working properly, and these clues often help to locate the tracking problem quickly.Here are just a few simple tools to view the relevant parameters of the system, of course, many tools are also through th

to implement the functions of the system FTP server. We only need to customize the settings based on our needs. In most LINUX releases, mongoingtonuniversity FTP is used. It is a famous FTP server software, generally referred to as wu-ftp. It is powerful and can run well on many UNIX operating systems, such as ibm aix, FreeBSD, HP-UX, NeXTstep, Dynix, SunOS, and Solaris. More than half of FTP servers on the Internet use it. Wu-ftp has many powerful f

. Configure the www1 and www2 servers and install httpd and PHP. The two servers have the same configuration. Take www1 as an example. 1) install httpd, PhP5, and PHP-mysql through yum Yum install httpd PhP5 PHP-mysql-y 2) mount the NFS Shared File System Mkdir/WWW Mount-t nfs 172.16.1.100:/www/htdoc/Web 3) modify the httpd configuration file so that the home page is stored in the/web directory. Vim/etc/htt

all the logic of the game. 1. This architecture has the following advantages: the client is connected to the game server game Servet through gate setver, and the game serverThe IP address is invisible to external users, making the game server safer and more vulnerable to attacks. A game server can also correspond to several gates.When a gate server is under attack or shut down, other gate servers co

Recently, I encountered some very old php (php5.3.x) web platforms and installed them on my computer (self-built server environment, not integrated environment) php version is very high (php5.6.x ). As a result, running on my computer causes various error messages !! Just change the version... recently, I encountered some very old php (php5.3.x) web platforms and installed them on my computer (self-built server environment, not integrated environment) php version is very high (php5.6.x ). As

Previously, we resolved the DHCP service content. Here we will mainly introduce the content of the DHCP server. Let's take a closer look at the application environment and Message format of the DHCP server. Hope to help you. DHCP server Application Environment of the DHCP server The DHCP server is usually used for IP Address Allocation in the following scenarios: • Large network scale, manual configuration requires a lot of work, and it is difficult t