Unix Basic Commands Tutorial

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This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

Linux has a variety of GUI (http://www.aliyun.com/zixun/aggregation/18378.html "> Graphical user interface), you can click on the mouse, drag, Work well without having to read a lot of documents at once. The traditional UNIX environment is the CLI (command-line interface), which is to type the command at the command line to perform the desired action. In contrast, this approach is faster and more powerful, and the disadvantage is that the user needs to know the commands for the relevant operations. ...

This article mainly describes how to use PHP file functions to obtain file information. First of all let's take a look at the basic introduction to the PHP file functions Differences between the dirname () and basename () functions in the dirname () file dirname () Get the directory portion of the file directory path, and basename () Get the basic information of the file? Before introduced the PHP directory read instance, we only traverse the directory (folder) function listSubDir based on ...

This year, big data has become a topic in many companies. While there is no standard definition to explain what "big Data" is, Hadoop has become the de facto standard for dealing with large data. Almost all large software providers, including IBM, Oracle, SAP, and even Microsoft, use Hadoop. However, when you have decided to use Hadoop to handle large data, the first problem is how to start and what product to choose. You have a variety of options to install a version of Hadoop and achieve large data processing ...

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