There are different computer servers in our working place. We have a mail server, proxy server, database server, web server, ERP application server, and many more. Monitoring each server is a very important aspect of the daily operation. Experiencing a downtime in a server will have the helpdesk hotline flooded with calls. Thus, server uptime […]

The security threat on smart phone increases by the days as more applications are made available. The multitasking mobile device operating system is of those major considerations by users. Having a multitasking system will allow more applications for smart phones. Many have frowned before on iPhone, iPad, and iPod Touch, for the lack of multitasking […]

Computer security is such a hot issue. The attacks that successfully penetrated many enterprises have made people think twice about Windows operating system. Search engine giant Google was one of those targeted with vulnerable version of Microsoft Internet Explorer for this reason they are pushing other OS like Mac or Linux. Nobody can really say […]

Having a test server environment is important for developers and support staff. We usually replicate production servers running RedHat Linux using rsync for creating test server environment. Avoiding conflicts when the test server are put live requires some basic changes. A primary thing to change is the hostname of the RedHat Linux test server. There […]

Linux operating system has evolved through the years from a mostly command line interface (CLI) to newer graphic user interface (GUI). Most computer geek prefer to use CLI over GUI. They might have a good reason as there are more things that could be done or better run on system command line. In Linux, a […]

Debugging of Oracle ERP Applications are dangerous to do on production servers. Thus, Oracle testing environments are pretty important for system administrator work. A separate clone Oracle database server with Oracle ERP Application running is a must for worry free debugging and testing. At work RedHat Enterprise Linux kernel version 2.4.9-e.62 host both the Oracle […]

Virtual machine are cool to use even for a working desktop. Backup of the whole virtual machine and taking snapshot copies is easy. I have a virtual machine which runs Windows XP SP2. The original system disk size of 10 Gb is a bit limited. Several system updates, installation of MS 2007 Office Suite and […]

Installation of Linux OS is not an everyday task. Preparing a RedHat Enterprise Linux server to run Oracle Database 10g is a recent task at work. Network configuration for a system is critical for networked services especially with Oracle Database 10g server. The result default configuration file entries are based on the data provided on […]

The previous system administrator left work hurriedly a month ago. Thus, I inherited a Red Hat Linux Enterprise server with little knowledge. There are many others who would be more apt at the task, but they refused the position. Colleagues consider it as something scary, which entails a big responsibility. They might be right at […]

The acquisition of Sun Microsystems by Oracle Corporation has been looming for sometime already. Today, I got email that the deal has been completed. The acquisition would allow Oracle to become a player in the cloud computing business. The merger would deliver various technology innovation with the addition of servers, storage, SPARC processors, Solaris operating […]

Computer software installation sometimes present some surprises especially on the Linux system. I have encountered such case when installing Oracle Database 10g Release 2 on a Redhat Enterprise Linux version 4. Expecting for an Oracle GUI for a Universal Installer, I was prompted by a series of text. It’s good to read closely those text […]

In Linux ifconfig is a basic command used to check the IP address. Recently, I did a fresh install of Redhat Linux on a virtual machine. Logged in as local user, I checked the IP address using of ifconfig command. I got a command not found error. I tried to verify if ifconfig is really […]

We have several Linux servers which communicate with each other. Date and time synchronization is important on those servers. I tried to use ntpdate to update the date and time from an NTP server, but have encountered an error. The ntpdate update error is “Operation not permitted”. Aside from that another error showed “No server […]

In a small computer infrastructure of 20 different servers like what we have inter connectivity of the servers are important. An Apache Dedicated Web server could communicate with an Oracle Database Server. A web application could be accessing a database server and trigger mail server action. Web applications could store information of files uploaded on […]

Robot computer applications that will run with GNU/Linux is now available. Robot hobbyists, makers, or software developers could now use the Linux-friendly USB-based sensing and control modules from Phidget. Phidget previous product versions need to be connected to a desktop computer via USB to work, but now it released a single board computer (SBC) to […]

IT should not be all about technology. We’ve been striving always to put business needs and policy. That said we end up with a lot of specialized applications through different units in our institution. There’s a growing challenge to support in-house applications. Problems like managing data synchronization and application integration are some of the common […]

I got an SVOA Warrior C2D 29300A computer CPU as replacement for my crashed old computer. I have installed Ubuntu Server 9.04 Linux on a breeze, but I still need to update some files from the Internet. I am behind some monitored network which requires authentication to browse the Internet. To get pass through this […]

A web application project for our undergraduate program was in the making. There are agreements of leveraging open source programming language like PHP which very popular to developers. The only concern is on how will it work well with proprietary Oracle Database, especially on data security. Developers don’t lack the choices available when building web […]

The Internet browser war is getting hot every time. The contest is not only between Microsoft’s Internet Explorer versus Mozilla’s FireFox browser, but a newer array of browser contenders. Apple’s Safari, Google’s Chrome, and Opera are some of the rising names for web browsers. I am very amazed with the particular development of the browser […]

Last week, I wrote about HTML 5 which would somehow take sometime to be accepted by web application developers for real world application. Everything on that has changed when the recently concluded Google I/O conference opened developers eyes on the actual applications used by Google. A gathering of Google engineers and web development experts pushed […]