This guide will detail the upgrade of the Java Development Kit (JDK) on a Red Hat Enterprise Linux (RHEL) 5.54 and CentOS 5.5 operating system. This example is accomplished through the use of PuTTY and XMing. In our example the following guide was used to install the original JAVA JDK. Install Java and Set Environment Variables Download JDK6 Note: The…
Read More »A server running Red Hat Enterprise Linux (RHEL) 5.5 after a period of time of successful log rotation, failed to logrotate the Apache logs. The Apache logs grew into the GBs. There didn’t seem to be any apparent or logical reason for this behavior, as the log rotation scripts were identical to other comparable servers. However, a command to debug…
Read More »When it comes to the removal of a virus, Trojan, pest, or some other malicious application, it has been my practice to isolate the problem by removing it from the equation. What is meant by that is that there are cases where the system is inoperable or where several applications have been hijacked like Task Manager, Registry Editor, and other…
Read More »A backup of every file in every sub-directory created zipped archives of each individual file. This was not the intended result. To resolve this each file must be restored to it’s original location and remove the created archive. Research directed me into a couple of different routes, that didn’t really work for me or produce the desired result. Here is…
Read More »JBoss logs can take up gigabytes of space. The log rotation works well, however, there is no (not that I could find) means to compress in real-time. However, with a little work, this may be accomplished with a cron job. I am not going to go into too much detail or background, there are many sites that do this well….
Read More »Using Red Hat Enterprise Linux 5.x (“RHEL”) and / or CentOS 5.x, I wanted to know the size of the existing folder. There is a utility that will summarize disk usage for each file, recursively for directories. It is called du. As it turns out, this utility is also applicable for other distributions of Linux including Ubuntu. This command line…
Read More »Logrotate is a utility that creates new log files, as well as, renames and compresses the old log files. The basic logrotate paramaters are located in the /etc/lograotate.conf file. The Apache logrotate paramaters are stored in the /etc/logrotate.d/httpd file. The default Apache logrotate file will create a new log file and rename the old log file and may look like…
Read More »Subversion is an open source version control system. This article will detail an installation of Subversion on a CentOS 5.x / Red Hat Enterprise Linux (RHEL) 5.x workstation. Subversion used for this article is version 1.6.911. Install rpmforge repository RPMforge.net release file. This package contains apt, yum and smart configuration for the RPMforge RPM Repository, as well as the public…
Read More »Tomcat 5.5 does not enable the admin or manager access by default. To allow for admin and manager access, the tomcat-users.xml file found in the /tomcat/conf directory. The original file may look like this. This is the modified file, adding manager and admin to the roles and usernames. Restart the Tomcat services, and you now have access to the administrative…
Read More »Compelling reasons why anyone would want to do this is that your trial period has expired, your support agreement has expired and you do not want to renew it, your system may be outdated, you want to install another application, or you just wanted to see if it could be done. Before continue reading, after testing this exercise and applying…
Read More »The following steps will autostart a VNC server on a Red Hat Enterprise Linux 5.x or CentOS 5.x operating system after a reboot. The Linux user account that needs VNC server to automatically start up after system reboot, must have a VNC password. To create a new (or reset a forgotten) VNC password, just login as root or su (switch…
Read More »This guide provides the steps to use the YUM package for CentOS on a Red Hat Enterprise Linux 5 installation. Delete current YUM package Find all the YUM packages Delete all yum package,if error cause by dependence ,add –nodeps Download the relative packages Install, verbose, and print hash marks (ivh) Download the CentOS Base Repository Update your system Source: http://www.linuxcream.com/blog/linux-system/linux_redhat/using-yum-package-via-centos-online-sources-in-rhel5/
Read More »SendEmail is a lightweight, command line SMTP email client. It was designed to be used in bash scripts, batch files, Perl programs and web sites, but is quite adaptable. SendEmail is written in Perl and requires no modules. SendEmail is licensed under the GNU GPL, either version 2 of the License or (at your option) any later version. Although it…
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To install MySQL server on the Red Hat Enterprise Linux 5 or CentOS5 operating systems is quite simple if you happen to know the correct yum packages. After a little research, this is the quickest and easiest path to get MySQL server up and running. Install MySQL server yum install mysql-server Autostart MySQL server chkconfig –level 2345 mysqld on service…
Read More »A recent attempt to install Tomcat5 through the RPM repositories with the statement yum install tomcat5 failed to be as successful to run the application. Also there is a need to run Tomcat with Sun Java JDK not the openJDK that is available through the channels. These are the steps to get Tomcat up and running on a Red Hat…
Read More »There are many sites that will provide far greater detail and comment than this one. However, this is a list of basic commands that I have found repeatedly useful. MySQL Commands Create a database List all databases Switch to a database Show tables in a database Delete a database Delete a table Show data in a table Find a specific…
Read More »This is yet another way that I had pieced together to install the Java Development Kit (JDK) on a Red Hat Enterprise Linux (RHEL) 5.4 and CentOS 5.4 system. This time, the process is accomplished through the use of PuTTY and XMing. Install Java and Set Environment Variables Download JDK6 Note: If this link doesn’t work, it may be a…
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