Install jdk on centos7

Install jdk on centos7

1. Download jdk

Http://www.oracle.com/technetwork/Java/javase/downloads/jdk8-downloads-2133151.html

(Based on the number of digits in the operating system, select the corresponding version, 32-bit select x86, 64 select x64)

2. Upload to centos

2.1 install the upload tool lrzsz and run yum install lrzsz on the command line.

2.2 cd to the uploaded destination directory

2.3 run rz on the command line and select the tar package downloaded in step 1.

2.4 decompress the file to/usr/local/

2.5 switch to the decompressed directory, pwd

3. The above path will be used as the value of the JAVA_HOME environment variable and configured to/etc/profile

Vi/etc/profile

In normal mode, press G to jump to the end of the file, and press o to add the following two lines

Export JAVA_HOME =/usr/local/jdk1.8.0 _ 121
Export PATH = $ PATH: $ JAVA_HOME/bin

The effect is as follows:

4. Execute source/etc/profile to refresh the environment variable you just set to the current shell.

Here, I will post the source explanation below man.

Man source

4.1 check whether the environment variables take effect

Echo $ JAVA_HOME

Echo $ PATH

5. check whether it is successful

Java-version

The configuration is OK.