Instalación de JDK 6 en CentOS 6

Pasos

1. Descargar la version de JDK 6 apropiada para el servidor (jdk-6u??-linux-????-rpm.bin) del sitio oficial de Oracle a un lugar predeterminado en el servidor (Ejm: /share/download/java)
2. Instalar JDK

   [usuario@servidor Escritorio]$ sudo su
   [sudo] password for usuario: 
   [root@servidor Escritorio]# cd /share/download/java
   [root@servidor java]# chmod +x *.bin
   [root@servidor java]# ls -l
   total 79172
   -rwxr-xr-x. 1 root root 81071431 mar 29 16:10 jdk-6u31-linux-x64-rpm.bin
   [root@servidor java]# ./jdk-6u31-linux-x64-rpm.bin 
   Unpacking...
   Checksumming...
   Extracting...
   UnZipSFX 5.50 of 17 February 2002, by Info-ZIP (Zip-Bugs@lists.wku.edu).
     inflating: jdk-6u31-linux-amd64.rpm  
     inflating: sun-javadb-common-10.6.2-1.1.i386.rpm  
     inflating: sun-javadb-core-10.6.2-1.1.i386.rpm  
     inflating: sun-javadb-client-10.6.2-1.1.i386.rpm  
     inflating: sun-javadb-demo-10.6.2-1.1.i386.rpm  
     inflating: sun-javadb-docs-10.6.2-1.1.i386.rpm  
     inflating: sun-javadb-javadoc-10.6.2-1.1.i386.rpm  
   Preparando...               ########################################### [100%]
      1:jdk                    ########################################### [100%]
   Unpacking JAR files...
   	rt.jar...
   	jsse.jar...
   	charsets.jar...
   	tools.jar...
   	localedata.jar...
   	plugin.jar...
   	javaws.jar...
   	deploy.jar...
   Installing JavaDB
   Preparando...               ########################################### [100%]
      1:sun-javadb-common      ########################################### [ 17%]
      2:sun-javadb-core        ########################################### [ 33%]
      3:sun-javadb-client      ########################################### [ 50%]
      4:sun-javadb-demo        ########################################### [ 67%]
      5:sun-javadb-docs        ########################################### [ 83%]
      6:sun-javadb-javadoc     ########################################### [100%]
   
   Java(TM) SE Development Kit 6 successfully installed.
   
   Product Registration is FREE and includes many benefits:
   * Notification of new versions, patches, and updates
   * Special offers on Oracle products, services and training
   * Access to early releases and documentation
   
   Product and system data will be collected. If your configuration
   supports a browser, the JDK Product Registration form will
   be presented. If you do not register, none of this information
   will be saved. You may also register your JDK later by
   opening the register.html file (located in the JDK installation
   directory) in a browser.
   
   For more information on what data Registration collects and 
   how it is managed and used, see:
   http://java.sun.com/javase/registration/JDKRegistrationPrivacy.html
   
   Press Enter to continue.....
   
    
   Done.
   [root@servidor java]# 

3. Vericamos la instalación:

   [root@servidor java]# java -version
   java version "1.6.0_31"
   Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
   Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)
   [root@servidor java]# javac -version
   javac 1.6.0_31
   [root@servidor java]# 

4. En caso de existir otras versiones de java establecemos la version isntalada a emplear por defecto

   [root@mail1 java]# alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_31/bin/java 2
   [root@mail1 java]# alternatives --config java
   
   Hay 2 programas que proporcionan 'java'.
   
     Selección    Comando
   -----------------------------------------------
   *+ 1           /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
      2           /usr/java/jdk1.6.0_31/bin/java
   Presione Intro para mantener la selección actual[+], o escriba el número de la selección:  2
   [root@servidor java]# 

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Extranet
https://extranet.newroute.net/page.php/Inst-JDK6