01-Install JDK

1.1 Download jdk compressed package

download link:

Oracle Access Manager Operation Error

Java Downloads | Oracle

After the download is complete, upload it to the server

# 1. Unzip the JDK to the specified directory

tar -zxvf jdk-8u171-linux-x64.tar.gz -C /usr/

Note: The -C parameter is to put the JDK decompressed file into the usr directory

# 2. Enter the jdk decompression directory to view

cd /usr/jdk1.8.0_171/

# 3. View detailed information

[root@localhost jdk1.8.0_171]# ls

bin db javafx-src.zip lib man release THIRDPARTYLICENSEREADME-JAVAFX.txt

# 4. Configure environment variables

vi /etc/profile

# 5. Add the following configuration at the end of the file

export JAVA_HOME=/usr/jdk1.8.0_171

export PATH=$PATH:$JAVA_HOME/bin

# 6. Load configuration takes effect

source /etc/profile load configuration takes effect

reboot restart the system

Note: You can choose any one of the above two options. The source can take effect immediately without restarting. In some cases, when the source cannot take effect, you can try restarting it.

# 7. Test environment variables

java

javac

java -version

1.2 rpm package installation

# 1. Install jdk

[root@localhost ~]# rpm -ivh jdk-8u171-linux-x64.rpm

Preparing... ################################### [100%]

Upgrading/installing...

1:jdk1.8-2000:1.8.0_171-fcs ################################# [100%]

Unpacking JAR files...

tools.jar...

plugin.jar...

javaws.jar...

deploy.jar...

rt.jar...

jsse.jar...

charsets.jar...

localedata.jar...

# 2. Search the default installation location

[root@localhost ~]# find / -name "java"

/usr/java/jdk1.8.0_171-amd64/bin/java

/usr/java/jdk1.8.0_171-amd64/jre/bin/java

# 3. Configure environment variables