Switch User In Unix

In the past, we have introduced some principles of software development, such as the 10 commandments of high quality code and the UNIX design principles described in the UNIX legend (next article). I believe that you can learn from middle school some knowledge of design principles, as I said in the "How Do I Recruit procedures", a good programmer usually consists of its operational skills, knowledge level, experience level and ability four aspects. Here I would like to talk about some of the principles of design, I think these things belong to the long-term experience summed up knowledge. These principles should be understood by every programmer. But...

First, customer description and requirements analysis of a unit to build a server 40 computer room. 　　Room for a total of 5 cabinets, plan each cabinet to put 8 servers, in the room has an administrator operation on all servers, local administrator configuration 1, now need to implement 1 administrator users and 4 ordinary users of all servers for local centralized management. 　　Integrated to the engine room all servers need to achieve local centralized management needs, Qinan-kinan KVM to all of the above requirements to do the following system solutions. Second, the computer room KVM Monitor Management system design plan ...

Simply put, a cluster (cluster) is a group of computers that provide users with a set of network resources as a whole. These individual computer systems are the nodes (node) of the cluster. An ideal cluster is that the user never realizes the nodes at the bottom of the cluster system, in their view, the cluster is a system, not multiple computer systems.     And the administrators of the cluster system can add and revise the nodes of the cluster system at will. Below on the server commonly used three cluster software to do a comparative analysis of the introduction: 1 ...

Open source Hotspot Inventory 1984, Richard Stallman launched GNU and Free Softwarefoundation, which has been open source for more than 28 years. From the bottom of the operating system to advanced desktop applications, there are open source footprint. Linux, which is especially open source operating system, is a controversial issue and is subject to many commercial attacks. 　　Many people like to put open source and business together, to accuse Open source is how "irregular", "energy consumption", "instability" and so on, especially Microsoft. Talk about ...

MapReduce: Simple data processing on large cluster

By the end of the year, the major companies have to carry out year-end summary and financial liquidation, if the HP's 2014 inventory, Hewlett-Packard Global vice president, China Hewlett-Packard Company group general Manager Jian more willing to use eight words to summarize, namely "growth, innovation, cooperation and landing." That's right! HP in 2014 was the biggest year of change, and it was a fruitful year. In particular, the introduction of HP Fusion system, let us see the key business areas of the most luxurious star-class product lineup. Under the new IT environment, "unmatched user experience" becomes another label for a converged system. Formal this pursuit ...

As cloud computing approaches, IT infrastructure is poised for a storm-like upheaval. Recently, the major server manufacturers frequent movements. EMC, allied to Lenovo last August, announced that it was working with Lenovo to develop next-generation X86 servers, Lenovo's IPDC dedicated servers, new server makers, and sky-cloud, which targets cloud-centric applications, unveiled a "hero" strategy; even IBM Power Bae, the representative of high-end machines, can't sit. , release the "New Power" program, including medium and low-end products included in the upgraded version. Why are these manufacturers ...

As expected, Microsoft will soon launch a new upgrade for Windows 8.1 Update 1. While the changes included in this upgrade are intriguing, it is a matter of greater concern that Microsoft will choose how to develop the windows in the future if it is to be more far-sighted. Recently, the Science and technology website TechRadar on the future development of Windows forecast: The latest update on Windows 8 Updates 1 of the news has surfaced, which makes many people for win ...

Given its powerful capabilities and good user interface, TSM has won the favor of many customers. But TSM is more for IBM Aix, http://www.aliyun.com/zixun/aggregation/11208.html ">microsoft Windows, Linux, HP-UX, and other operating systems, at Sun There are relatively few uses on the Solaris platform. Most of the Sun Solaris platforms currently use Symantec ...

Six open source monitoring tools which one did you use? Published in 2013-03-15 12:22| Times Read | SOURCE csdn| 0 Reviews | The author Zhang Hong Month open source Monitoring Tool Muningangliagraphitepingdom Summary: This article introduced 6 practical monitoring tools, not only can you monitor the network resources, but also monitor the server, user requests, Web performance, etc., to your site to provide comprehensive,  One-stop guidance and monitoring. If you think the site is built, it's all right.