centOS7, jdk environment of ubuntu (linux) Configuration

In fact, jdk configuration on linux is very simple, but because there are a lot of linux kernel is, for example, I know of ubuntu and centOS. When configuring the difference between the two profiles.

However, the environment variable is the same.

Here to talk about the centOS and ubuntu jdk following configuration.

We must first download a good jdk, you can go to Baidu, and then download it at the official online face.

A: centOS following configuration jdk

1. jdk extract to / usr / local / below. Command is as follows:

　　

tar -zxvf jdk-8u192.tar.gz /usr/local/

2. You can rename the name, so I think a good deal with some

First enter, usr / local / below, and then rename jdk:

　

cd /usr/local/
mv jdk-8u192 jdk

To then configure the environment:

vim /etc/profile

In the face of this final document is written:

 

export JAVA_HOME=/usr/local/jdk

export PATH=$JAVA_HOME/bin:$PATH 

export CLASSPATH=.:$JAVA_HOME/lib/dt.tar:$JAVA_HOME/lib/tools.jar

 

Then let the acting profile:

　　

source /etc/profile

 

This configuration is completed,

You can check whether the configuration with the following command:

java -version

Displays the version of jdk, then it was successful configuration.

 

Recommended jdk installation blog: https: //www.cnblogs.com/116970u/p/10400436.html

 

Two: ubuntu following configuration jdk

Jdk will also extract to / usr / local / directory, then rename jdk

That is, when the configuration file, select a different file, you can open the configuration file with the following command:

gedit ~/.bashrc

After opening the file, after the file's input:

export JAVA_HOME=/usr/local/jdk

export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/lib/dt.tar:$JAVA_HOME/lib/tools.jar

 

Use the command to make the configuration file to take effect:

　　

source ~/.bashrc

Use java -version view the configuration result, if the version number appears on the configuration was successful