big data hadoop basics

@sparkslave02:~/ShellLearning/Chapter12# ./functionDemo.sh arg1./functionDemo.sharg1 args3. Shell Control Structure PreliminaryLike other programming languages, the shell has its own control structure, including for loops, while loops, until loops, if statements, and so on. This section first describes the use of a For loop, with a lot of usage for the For loop, and gives the four most commonly used for loop usages(1) for I in $ (seq 10)Root@sparkslave02: ~/shelllearning/chapter12# vim forloop.s

One: Regular expression1. The difference between a wildcard and a regular expressionWildcard characters *,? ，[]。Difference:Wildcard characters to match file namesThe regular expression is to match the string2. Meaning of ". *".: Any character*: Matches the previous character any time3. Filter out lines with a character　　4. Filter out lines without a keyword　　5. Show lines that begin with #　　6. Display lines that are not in English at the beginning　　7. Print o The row that appears two times　　8. S

equivalent4 Batch ModificationCommon commands:CL modifies the current characterCW starts at the cursor and changes to the end of the wordThe CB is modified from the beginning of Word until it is at the cursorc) Change to the end of the sentence starting at the current cursorC} starts at the current cursor and changes to the end of the paragraphC (start with the current cursor and change to the beginning of the sentenceC{starts at the current cursor and changes to the beginning of the paragraphC

.bash_profile,怎么办？ 2.注意.bash_profile的权限问题 生效： source /etc/profile . .bash_profile 或者 source .bash_profileTo delete a file:rm 删除时需要询问rm -f xxx强制删除文件，不询问rm -r -f 或者 rm -rf 递归，强制删除文件夹 慎用：rm -rf / (手工)Shell script:[[Email protected] ~]# mkdir/home/jepson/001[[emailprotected] ~] # jpath= "/home/jepson/001" [[email protected] ~]# echo $jpath/home/jepson/001[[email protected] ~]# Touch/home/jepson/001/xxx.log[[email protected] ~]# echo $jpath/home/jepson/001[[email protected] ~]#

data position, big data engineers can say that their income has reached the top level of similar products. As a high-paying job with less people and less money, the skill map that big data development engineers need to master is also very challenging. If you make a mind map

Environment and objectives: -System: VMWare/Ubuntu 12.04 -Hadoop version: 0.20.2 -My node configuration (Fully Distributed cluster) Master (job tracker) 192.168.221.130 H1 Slave (Task tracker/data node) 192.168.221.141 H2 Slave (Task tracker/data node) 192.168.221.142 H3 -User: Hadoop_a

Transferred from: http://www.aboutyun.com/thread-7569-1-1.htmlBig Data We all know about Hadoop, but there's a whole range of technologies coming into our sights: Spark,storm,impala, let's just not come back. To be able to better architect big data projects, here to organize, for technicians, project managers, architec

speed of data, they started looking for more innovative ways to use the data.2. Are you sure you want the eggs to touch the stone?"All right, but why do I need new tools? Can't I use the original software tools to analyze big data?" We're talking about using Hadoop to arran

Computing ClustersHigh-performance computing clusters, referred to as HPC clusters. Such clusters are dedicated to providing powerful computing power that a single computer cannot provide, including numerical computation and data processing, and tends to pursue comprehensive performance. HPG is similar to supercomputing, but different, and computing speed is the first goal of Supercomputing pursuit. The fastest speed, maximum storage, the largest vol

Access to big data has been used for Hadoop for several years. Compared with the ever-changing front-end technology, I still prefer big data-this has been stir for many years, but also believe that the technology research in big

revenue growth, which are distributed in business operations, customer experience, enterprise innovation, and operation support. So how can we realize the value of 2 trillion of the data? Dan vesset, vice president of IDC Data Analysis and Information Management Group, said that cloud-based Data Analysis and Management Solutions play an important role in promoti

big data analysis project focuses not on big data, but on big data analysis technologies and methods. Big Data analysis requires high-perfo

Big Data The following are the big data learning ideas compiled by Alibaba Cloud. Stage 1: Linux This phase provides basic courses for Big Data learning, helping you get started with big