The first week of Hadoop Learning (II)

According to this blog http://dblab.xmu.edu.cn/blog/install-hadoop-in-centos/ in learning tutorial;

First, in accordance with the first step of the operation of the tutorial when the computer directly to a blue screen.

But still failed to attack the passion I want to learn hadoop. Continue to boot centos

According to the tutorial, I just created a user's own name, so here hadoop need to continue to create an account

Hadoop add a user and password, and modify permissions good, Log

Switching into account hadoop

Then enter the SSH mounting operation, first open the terminal, if the test system has been installed ssh

Detects that the next step is already installed, install the Java environment, you need to install Java jdk in linux environment through yum command

Enter the command to wait for a period of time, the installation process:

Next JAVA_HOME environment variable configuration system, and detecting whether the installation is successful

Into the configuration file, add at the end of its value, enter the command file so that the entry into force

Test environment variable configuration and whether it is properly installed java environment

Prompted by the system and can not have this folder, we go to that letter and see whether there is appropriate folder to find the environment variable to the wrong place

According to the path all the way to the final look of the letter, we found the appropriate files. Find any character entered the wrong place is halfway there

Yes usr

Yes lib

Yes jvm

java-1.7.0-openjdk error; not in this folder, but there is a java-1.7.0 and two file folders java-openjdk

To determine which folder is the correct environment variables then have to be into it to see if the corresponding file, java-openjdk no problem, and then view the file also exists java-1.7.0, select the closest java-1.7.0 testing as a priority target