Network Troubleshooting Linux

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Private collection: Seven open source Linux Network Service System

For small and medium-sized enterprises, there are many free and open source router and firewall solutions, even as a business choice.   Many of these products offer LAN services, such as VPN services, hotspot gateways, and the use of mandatory network portals to share wireless networks. Here, the editors find open source and free router projects that are suitable for businesses that include small businesses, midsize, and even the size of Cisco and Juniper.  Gossip Less, we look at these seven open source and free Linux network operating system. &nb ...

Java programmers master the system knowledge of the CPU

Last year in the investigation of a lot of java applications, see some of the phenomenon is the programmer to run on their own environment to read the program rarely lead to troubleshooting problems will be more frustrating, so think of writing this series of articles, procedures To provide functionality to end-users, the code is only one part of it, and it needs to be relied on for jvm, os, server hardware, networking, load balancing, etc. In this series of articles, Several parts, more is only a science role, because os I use are linux, this series ...

SME network security guidelines

SME network security guidelines. [Theory] As the training site said, the enterprise's network security is a system, do all aspects of what is a major project, even if only a branch of network security also takes a long time to build, so in the early need to resolve the current main contradictions (ie "Stop bleeding" and control most of the risks in the first place). Based on the past experience of several of our people, we suggest that you have the following key positions in the control, you can achieve more with less effort immediate effect: 1) port control. All server non-business ports are all closed to the internet, managing ...

Design principle of reference design for Hadoop integrated machine

Hadoop is a highly scalable, large data application that can handle dozens of TB to hundreds of PB of data through fewer than thousands of interconnected servers. This reference design realizes a single cabinet of Hadoop cluster design, if users need more than one cabinet of Hadoop cluster, can expand the design of the number of servers and network bandwidth easy to achieve expansion. Hadoop solution The features of Hadoop design Hadoop is a low-cost and highly scalable large data place ...

Virtualization, cloud computing, open source code, and more

A, virtualization virtualization refers to the ability to simulate multiple virtual machines on the same physical machine. Each virtual machine has a separate processor, memory, hard disk, and network interface logically. The use of virtualization technology can improve the utilization of hardware resources, so that multiple applications can run on the same physical machine with each other isolated operating environment. There are also different levels of virtualization, such as virtualization at the hardware level and virtualization at the software level. Hardware virtualization refers to the simulation of hardware to obtain a similar to the real computer environment, you can run a complete operating system. In the hardware virtual ...

Global Super Competition performance "Triple Crown" led Super server

"Tenkine Server channel December 16 News" Denver local time November 19, held here in the SC13 Global Top500 Awards ceremony, the organizing committee announced from China's National Defense Science and Technology University team to 8.22 trillion times per second Linpack results obtained SC   13 Global University students Super Computer Competition computing performance, this is the national defense hkust after ISC 12, SC 12 after the third time the title. As the "Highest Computational performance award" of the defending champion, the National Defense Science and Technology University in the competition set ...

Promotion of DELL R820 2U rack server 26000 RMB

"Tenkine Beijing, March 28" The Dell PowerEdge R820 is a 2U rack server, primarily located in large enterprises and data centers, with a 4-way 2U height rack design and standard four powerful Intel Xeon e5-4607 six-core processors. 96GB of memory and 1.5TB hard drive, and standard 4 Gigabit network card, configuration is tough. Not only is the configuration high, the Dell PowerEdge R820 also has its own features, such as no system virtual machine wmware ESXi, I ...

Dell Performance Server PowerEdge T110 II hot

"Tenkine Server channel December 19 message" This tower is a perfect combination of price advantage, reliability, collaboration, and data protection to improve business continuity and productivity, and is the ideal choice for a small business's first server. The tower server is relatively flexible and practical, and can be easily used without cabinet support, the Dell T110 Tower Server introduced today is a needle for small business products, carrying the core processor processor, and standard 2G memory, 500G hard drive.   The performance is good, and the stability is extremely strong. This paragraph ...

Ubuntu 10.10 Install Acer 4741G GT420 graphics driver

4741G can be said to be a complementary model of Acer 4745G, the series using the Nvidia display chip design, although the hardware configuration compared to 4745G slightly lower, but for audio and video entertainment, as well as general game applications, is very suitable.       At present, a Acer Aspire 4741G-382G50MNKK notebook in the dealer Beijing Hong Japan Oriental Price for 5099 yuan. Acer Aspire 4741g-382g50m ...

Hot promotion DELL R420 1U Rack Server 16800 RMB

"Tenkine Beijing March 27 News" Dell PowerEdge R420 belongs to dual-channel 1U rack server products. With double density, strong performance and high scalability. To meet the needs of computing-intensive enterprises. This product uses the newest Xeon E5-2400 series processor, supports 12 memory, the built-in two third generation PCIe socket, and may provide the sufficient I/O bandwidth. Recently, there are businesses on the server product model Dell PowerEdge R420 (E5-2420*2/32G/1TB sas*3/...

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