[] [Linux installation jdk jdk8.0]

System Environment: Centos7

First, download jdk8.0

jdk official website: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

 

Download the appropriate version of jdk. My linux is 64, and here I chose the JDK-8u221-linux-x64.tar.gz .

Click to login or downloaded from the download link below Baidu cloud.

jdk8u131： wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz

Baidu Cloud: link: https: //pan.baidu.com/s/1vlCbdVmjKi9gL0Hb6O28Lg     extraction code: rnad 

Second, extract the tar package

1. Download the tar package uploaded via ftp to the server, and here I put / home path

1 [root@localhost home]# ls
2 jdk-8u221-linux-x64.tar.gz

2. Extract

1 [root@localhost home]# tar -zxvf jdk-8u221-linux-x64.tar.gz 
　　……
2 [root@localhost home]# ls
3 jdk1.8.0_221  jdk-8u221-linux-x64.tar.gz

Rename the jdk1.8.0_221 jdk

. 1  [Home the root @ localhost] # Music Videos jdk1.8.0_221 / JDK
 2  [the root @ localhost Home] -Al LS #
 . 3  Total amount 190 524
 . 4  drwxr-XR-X.. 3 the root 51 is the root. 9 13:08 dated 18 is.
 . 5  DR -xr-xr-x 17 root root 224 . 9 dated 14:02 .. 16.
 . 6  drwxr XR-X-143. 7 10. 7 245 dated JDK 19:37. 4.
 . 7 -rw-R & lt -.. 1 the root r-- root 195094741 9 Yue 18 12:57 jdk-8u221-linux- x64.tar.gz

Third, set environment variables jdk

• vi / etc / profile

Press shift + g jump to the end of the document, edit it to add environment variables jdk press o

. 1  Export the JAVA_HOME = / Home / jdk // file path where the jdk
 2  Export the JRE_HOME the JAVA_HOME = $ {} / JRE
 . 3  Export the CLASSPATH =:. $ {The JAVA_HOME} / lib: $ {} the JRE_HOME / lib
 . 4 Export the PATH = $ {JAVA_HOME} / bin: $ PATH

Re-initialize the profile configuration file

•  . /etc/profile

1 [root@localhost home]# . /etc/profile
2 [root@localhost home]# java -version
3 java version "1.8.0_221"
4 Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
5 Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)

jdk8.0 installed successfully!