Install the JAVA environment in CentOS7.0 and centos7.0java Environment
Install the JAVA environment on CentOS7.0
Install JDK
1. Configure JDK Environment Variables
Upload the downloaded jdk(jdk-7u75-linux-x64.gz) file to the
Document directory
1. Read the compressed input file directly
2. compress the intermediate results produced by mapreduce job
3. compress the final computing output results
4. is the use of hadoop-0.19.1 to compare a task with three compression
Use GeoIP2 to analyze visitors' IP addresses to obtain geographical location information.
Link: http://blog.csdn.net/johnnycode/article/details/42028841
MaxMind GeoIP2 is widely used to identify locations and other features of Internet users, this
# The BBB, CCC, and BNR subdirectories exist in the current tree directory. Now, you need to filter out the dump file of gz, that is, you do not need to package [oracle @ linux1 ~]. $ Tree AAAAAA | -- BBB | '-- SYTST_temp.dbf | -- BNR | -- dump |
Before starting the blog, I wish you all the best in the New Year. New Year's new weather, hope to have more exchanges with you in the new year, and learn and make progress together.
The gdal virtual file starts from version 1.6.0 and is mainly used
1. Two common compression methods in Linux: (unpack: tar-zxvf + directory to be generated by package name)
Bz2 File
Time tar-jcvf j.tar.bz2 workspace/
340 m 56.8%
Real 13m20. 975 s
User 11m13. 872 s
Sys 0m5. 985 s
GZ File
Time tar-zcvf z.tar.gz
Users often need to back up data in computer systems. To save storage space, backup files are often compressed. The following describes the backup and compression commands.
Tar command
Tar can create files and directories. Using tar, you can
In liunx, extracting the current file is very simple. You can use the simplest tar command and unzip to implement it, but I will give you a variety of file extraction passwords in
Linux decompress and package command Daquan gzip command to reduce the file size has two obvious advantages, one is to reduce the storage space, the other is through the network to transfer files, can reduce the transmission time. Gzip is a
Linux commands and tools 1. view the processes running in the system # ps auxw2 and netstat commands view the services monitored by the system # all valid connection information lists of netstat-ln-, this includes ESTABLISHED connections
The benefits of Log4j 2 will not be discussed with everyone. If you search for 2, it means you have some knowledge about it and want to use it, so you can get started directly here.
1. Download log4j 2 from the official website.To import the jar
When we learn knowledge, we often encounter problems, solve these problems, and have a solid grasp of basic knowledge. Linux is becoming more and more popular. Do you know about Linux? Are you an application of Linux? This article describes common
Do you want to know the truth about the Linux vmware system? Do you want to know what is inherent in the Linux vmware system? I will only give you a full introduction to the Linux Application Instances of the Linux vmware system.
1 Introduction to
I bought a book, the second version of the hadoop authoritative guide. It's really good to write, that is, my mind is too jumping. I saw two chapters before and after reading them (no way, one of his ideas is to see Appendix A installing hadoop and
In Perl development, it is very likely that some files in different formats, such as XML, PDF, CSV, and RSS files, are different from some binary data formats. Perl applications need to operate on these files to read and write them.
In this case,
Run make------
In general, the simplest thing is to directly input the make command under the command line. The make command will find the makefile in the current directory for execution, and everything is automatic. But sometimes you may just want
How to import and export MySQL database ---- *. SQL File Operation
1. OverviewThere are two ways to import a MySQL database:1) Export the database SQL script first and then import it;2) directly copy database directories and files.In different
Tar subcontracting compression and consolidation today is a happy day, ushered in a new project----MediaTek tablet. But encountered a problem, the tar of sub-package compression and merger incredibly in the information book can not find, so I
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.