1. Linux Environment building

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3.1 install JDK

3.1.1 Upload JDK file

3.1.2 decompression JDK

3.1.3 Mobile installation package

Mobile installation package

`[root@localhost src]# mv jdk-8u51-linux-x64.tar.gz software/`
* 1

3.1.4 Modify file name

`[root@localhost src]# mv jdk1.8.0_51 jdk1.8`
* 1

3.1.5 To configure JDK environment variable

File directory : /etc/profile
Edit the file : vim /etc/profile

Let the environment variables take effect :