Installing Java 1.8 and Tomcat 8 in Centos 7

I have been setting up our servers in Amazon AWS and found that installing JDK is not as straightforward as I thought it would be 🙂

I had to do some googling before I could settle down on a method to setup and run tomcat 8 using jdk 1.8 in centos. Putting the steps below for reference to anyone who is trying to achieve the same in AWS:

Setting up Java 8

1. Login into server
2. Execute cd /opt
3. Install wget using  yum install wget 
4. wget –no-cookies –no-check-certificate –header “Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie” http://download.oracle.com/otn-pub/java/jdk/8u45-b14/jdk-8u45-linux-x64.rpm 

   NOTE : Please change the version if using a different version
   Reference:
   http://tecadmin.net/install-java-8-on-centos-rhel-and-fedora/
    

5. Run the command :
   rpm –ivh jdk-8u45-linux-x64.rpm
6. Check the java version using
   java –version
7. Set the global environments
   export JAVA_HOME=/usr/java/jdk1.8.0_45/
   export PATH=$PATH:$JAVA_HOME
8. Add to the startup profile
   vi /etc/profile.d/java.sh
9. Put the following content in the file

   #!/bin/bash
   JAVA_HOME=/usr/java/jdk1.8.0_45/
   PATH=$JAVA_HOME/bin:$PATH
   export PATH JAVA_HOME
   export CLASSPATH=.

10. Change the permission from all
    chmod +x /etc/profile.d/java.sh

11. Set the environment variables permanently
    source /etc/profile.d/java.sh

Reference
http://www.unixmen.com/install-oracle-java-jdk-8-centos-76-56-4/

Setting up Apache Tomcat 8

Setting up of tomcat is pretty straightforward. We just need to have the latest version downloaded and extracted to /opt

1. Login into the server
2. cd /opt
3. wget http://mirrors.advancedhosters.com/apache/tomcat/tomcat-8/v8.0.22/bin/apache-tomcat-8.0.22.tar.gzNote: Replace the link with the latest version 
4. Extract the tar file
   tar xzf apache-tomcat-8.0.21.tar.gz

5. Setup the environment variable for the catalina home
   echo “export CATALINA_HOME=\”/opt/apache-tomcat-8.0.22\”” >> ~/.bashrc
   source ~/.bashrc

6. Start the tomcat from bin folder

Reference :
http://tecadmin.net/install-tomcat-8-on-centos-rhel-and-ubuntu/