Expression In Shell Script

By completing this chapter, you will be able to do the following: Use the while statement to repeatedly execute a piece of code when the condition is true. Use the loop statement to repeatedly execute a piece of code until the condition is true. Use the interactive for statement for loop control. 1. Brief introduction to the loop objective: Repeat the execution of a list of commands. control; a return value based on a key command. Three forms: While ... do ... do loop ... do ... do.

Intermediary transaction SEO diagnose Taobao guest Cloud host technology Lobby database optimization is a very complex task, because it ultimately requires a good understanding of system optimization. 　　Even though the system or application system does not know much about the optimization effect is good, but if you want to optimize the effect of better, then you need to know more about it. 1, the optimization of the system to run faster the most important factor is the basic design of the database. 　　And you have to be aware of what your system is going to do, and the bottlenecks that exist. The most common system bottlenecks are as follows: ...

1 Hadoop fs ----------------------------------------------- --------------------------------- The hadoop subcommand set executes on the root of the / home directory on the machine Is / user / root --------------------------------------------- ----------...

Originally wanted to write about the game plot design, but look at WPS light blue background, involuntarily have to change the title of this article.　　Moreover, the green game, the concept of the blue game is not the first to be proposed, then I this light blue nature can also explain the pass. Plot design is the soul of the game, both experts and scholars have said, even several very heavyweight bosses say so.　　But since I began to do the plot design, I found that the plot design of today's online game is indeed very difficult. First, the online game is an open world, because it is too open, so often ...

Development by the game of oranges, by the attention of the players and look forward to the "sword rain Online" is a deep combination with the film martial arts game works, following a few days ago, John Woo, Wu was invited to visit the 2010 Tokyo video games show for the game Platform, film company held "Sword Rain" press conference Su Zhaobin and Daili both appeared for the film, in addition to the announcement of the film will be released on October 22 in the good news, more talk about the film filming process and bitterness, but also look forward to this is full of enmity and hatred of the new style martial arts works, the box office in Taiwan opened the red. At the same time, "sword rain Online" ...

Development by the game of oranges, by the attention of the players and look forward to the "sword rain Online" is a deep combination with the film martial arts game works, following a few days ago, John Woo, Wu was invited to visit the 2010 Tokyo video games show for the game Platform, film company held "Sword Rain" press conference Su Zhaobin and Daili both appeared for the film, in addition to the announcement of the film will be released on October 22 in the good news, more talk about the film filming process and bitterness, but also look forward to this is full of enmity and hatred of the new style martial arts works, the box office in Taiwan opened the red. At the same time, "sword rain Online" ...

01. On the tip of China 2, "China II on the tip of the tongue" in the April this year, a fire, the mouth-watering food with beautiful pictures and music, so that many viewers tongue reached the point of endurance. And we carefully delve into it, in fact, behind all of this is a copy of the soul in doing a very important role, the following copy June everyone pick the Tongue 2 second episode "Evergreen" part of the copy bar. With 1000 hands, there are 1000 flavors. Chinese cooking is incredibly mysterious and difficult to replicate. From the mountains to the downtown, the culinary teachings still follow the traditional way of mouth and empathy. Wisdom of the ancestors, ...

Purpose This document is designed to help you quickly complete the Hadoop installation and use on a single computer so that you can experience the Hadoop Distributed File System (HDFS) and the map-reduce framework, such as running sample programs or simple jobs on HDFS. Prerequisite Support Platform GNU is a platform for product development and operation. Hadoop has been validated on a clustered system consisting of 2000-node GNU hosts. The WIN32 platform is supported as a development platform. Because the distributed operation is not yet in the wi ...

Ling played Mr. Wang Shikeki as a TV version of the "Painted Skin" will be broadcast, director of the behind-the-scenes tidbits and top secret points.　　This newspaper appraisal: Although the television version's lineup appeal is not big, but still is worth looking forward to. South reporters Cai Liyi intern Lai Xiaoyan by the film version of the "Painted skin" production team to create a new, Shikeki, Ling, Li Zonghan, Tammy starring TV version of the "Painted Skin", will be landed on March 3, the southern Taiwan Film and television channel (TVS4) Gold Theater, some of the stars will be in Guangzhou next Thursday. For this 2011 of much-watched love magic ...