Below set of steps involve setting up Tomcat 6 on CentOS 5 with Java 1.6 Download Apache Tomcat $ wget http://apache.parentingamerica.com/tomcat/tomcat-6/v6.0.36/bin/apache-tomcat-6.0.36.tar.gz Go to opt/ folder and extract Tomcat $ cd /opt $ tar -xzf apache-tomcat-6.0.36.tar.gz Create a tomcat user $ useradd -d /opt/apache-tomcat-6.0.36/ tomcatuser Change user permission on tomcat folder $ chown -R tomcatuser:tomcatuser apache-tomcat-6.0.36 (more…)

At the time of writing this article Java 6 (update 37) was available at http://www.java.com/en/download/manual_v6.jsp First set up a folder where you want to install java $ cd /opt $ wget http://download.oracle.com/otn-pub/java/jdk/6u37-b06/jdk-6u37-linux-x64-rpm.bin $ chmod +x jdk-6u37-linux-x64-rpm.bin $ ./jdk-6u37-linux-x64-rpm.bin (more…)

To check the current installation of java $ rpm -qa | grep jre $ rpm -qa | grep jdk $ rpm -qa | grep openjdk To remove the java installs $ yum erase jre jdk openjdk

Fail2ban is a software used to ban IP's which shows strange behavior. It can be configured to reject IP's for a certain amount of time. To install Fail2ban we need to download the application from the source. Login as the root user and go to /opt $ cd /opt $ wget http://downloads.sourceforge.net/project/fail2ban/fail2ban-stable/fail2ban-0.8.4/fail2ban-0.8.4.tar.bz2?use_mirror=transact Next unzip the downloaded file $ tar -xf fail2ban-0.8.4.tar.bz2 $ cd fail2ban-0.8.4 (more…)

This error pops up when you try to stop the Tomcat server when the server has not started. If you restart the Tomcat server, the error vanishes.

Main is a static code block and to call a method within the same class you need to declare the other method also as static if you would want to execute the method during run time without instantiating it as an object. Static methods are class methods and the methods without static keyword in them are instance methods.