How to install Java SDK on CentOS

Question

I have CentOS 5  but I don t know the steps to install Java SDK on Linux   Where to download the RPM file and what can I do next to fully install that   Then I need to install Tomcat   Or is there any ready-made package for all

User · Answer

use the below commands to install oracle java8 through terminal

Step -1) Visit Oracle JDK download page, look for RPM version

Step -2) Download oracle java 8 using the below command wget --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-x64.rpm

Step -3) Install the java8 using below command sudo yum localinstall jdk-8u121-linux-x64.rpm Now the JDK should be installed at /usr/java/jdk1.8.0_121 Step -4) Remove the downloaded .rpm file to utilize the space. rm jdk-8u121-linux-x64.rpm

Step -5) Verify the java by using command java -version

Step -6) If the CentOS has multiple JDK installed, you can use the alternatives command to set the default java sudo alternatives --config java

Step -7)Optional set JAVA_HOME Environment variables. copy the path of jdk install i.e /usr/java/jdk1.8.0_121 use below command to export java home export JAVA_HOME=/usr/java/jdk1.8.0_121 export PATH=$PATH:$JAVA_HOME

User · Answer

If you want the Oracle JDK and are willing not to use yum rpm  see this answer here   Downloading Java JDK on Linux via wget is shown license page instead  As per that post  you can automate the download of the tarball using curl and specifying a cookie header   Then you can put the tarball contents in the right place and add java to your PATH  for example   curl -v -j -k -L -H  Cookie  oraclelicense accept-securebackup-cookie  http   download oracle com otn-pub java jdk 8u45-b14 jdk-8u45-linux-x64 tar gz  gt  jdk tar gz  tar xzvf jdk tar gz sudo mkdir  usr local java sudo mv jdk1 8 0 45  usr local java  sudo ln -s  usr local java jdk1 8 0 45  usr local java jdk  sudo vi  etc profile d java sh export PATH   PATH  usr local java jdk bin  export JAVA HOME  usr local java jdk  source  etc profile d java sh

User · Answer

Sventeck  perfecto   redhat docs are always a great source - good tutorial that explains how to install JDK via yum and then setting the path can be found here  have fun   - Install OpenJDK and set  JAVA HOME path  OpenJDK 6   yum install java-1 6 0-openjdk-devel   OpenJDK 7   yum install java-1 7 0-openjdk-devel   To list all available java openjdk-devel packages try   yum list  java- -openjdk-devel

User · Answer

Since Oracle inserted some md5hash in their download links  one cannot automatically assemble a download link for command line   So I tinkered some nasty bash command line to get the latest jdk download link  download it and directly install via rpm  For all who are interested      wget -q http   www oracle com technetwork java javase downloads index html -O   index html  amp  amp  grep -Eoi       index html   grep -Eoi   technetwork java javase downloads jdk8-downloads- 0-9   html     head -n 1    awk   print  http   www oracle com  1     xargs wget --no-cookies --header  Cookie  gpw e24 xxx  oraclelicense accept-securebackup-cookie   -O index html -q  amp  amp  grep -Eoi   filepath        jdk-8u 0-9  -linux-x64 rpm   index html   grep -Eoi  http          xargs wget --no-cookies --header  Cookie  gpw e24 xxx  oraclelicense accept-securebackup-cookie   -q -O   jdk8 rpm  amp  amp  sudo rpm -i   jdk8 rpm   The bold part should be replaced by the package of your liking

User · Answer

Here is a detailed information on setting up Java and its paths on CentOS6   Below steps are for the installation of latest Java version 8     Download java rpm package from Oracle site   jdk-8-linux-x64 rpm  Install from the rpm   rpm -Uvh jdk-8-linux-x64 rpm  Open  etc profile  and set the java paths  save it  Check the java installation path  and java version  with the commands  which java  java -version   Now you can test the installation with a sample java program

User · Answer

I have written a shell script to install uninstall java on centos  You can get it done by just run the shell  The core of this shell is    1 download the jdk rpm RedHat Package Manager  package  2 install java using rpm    You can see more detail here  https   github com daikaixian WaterShell tree master program installer   Hope it works for you

User · Answer

On centos 7  I just do  sudo yum install java-sdk  I assume you have most common repo already  Centos just finds the correct SDK with the -devel sufix

User · Answer

To install OpenJDK 8 JRE using yum with non root user  run this command      sudo yum install java-1 8 0-openjdk   to verify  java -version

User · Answer

An alternative answer is   sudo yum list   java-1     grep open    than select one from list and install that   for example   sudo yum install java-1 7 0-openjdk x86 64

User · Answer

The following command will return a list of all packages directly related to Java  They will be in the format of java- lt version gt      yum search java   grep  java-    If there are no available packages  then you may need to download a new repository to search through  I suggest taking a look at Dag Wieers  repo  After downloading it  try the above command again   You will see at least one version of Java packages available for download  Depending on when you read this  the lastest available version may be different   java-1 7 0-openjdk x86 64   The above package alone will only install JRE  To also install javac and JDK  the following command will do the trick     yum install java-1 7 0-openjdk    These packages will be installing  as well as their dependencies    java-1 7 0-openjdk x86 64 java-1 7 0-openjdk-accessibility x86 64 java-1 7 0-openjdk-demo x86 64 java-1 7 0-openjdk-devel x86 64 java-1 7 0-openjdk-headless x86 64 java-1 7 0-openjdk-javadoc noarch java-1 7 0-openjdk-src x86 64

User · Answer

yum install java-1 8 0  and then   alternatives --config java   and check   java -version

User · Answer

This is what I did     First  I downloaded the  tar file for Java JDK and JRE from the Oracle site  Extract the  tar file into the opt folder  I faced an issue that despite setting my environment variables  JAVA HOME and PATH for Java 9  it was still showing Java 8 as my runtime environment  Hence  I symlinked from the Java 9 0 4 directory to  user bin using the ln command   I used java -version command to check which version of java is currently set as my default java runtime environment

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