Author Archives: Marko

Latest Oracle (Sun) Java JDK and JRE 6 on Ubuntu operating systems

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Java LogoLets be honest, coding on Linux will probably include some Java based application like Eclipse or NetBeans. That's actually not a bad thing because we get to carry our development environment with us when using other proprietary operating systems. But since Oracle sliced "Operating System Distributor License for Java" and now nobody can legally host Java repository we have to install Java manually by downloading their JRE or JDK blob from Oracle servers. That isn't exactly hard thing to do but we don't want to give Oracle the pleasure of knowing that they made our already crowded day a little more complicated. So here I'm presenting work of excellent Debian packaging work by Janusz Dziemidowicz and a fellow open source enthusiast Martin Wimpress from Flexion.Org. These guys made it possible for us to create Java JDK 6 and JRE 6 deb packages and create local Java repository our selves.

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Linux system programming: Open file, read file and write file

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Terminal PromptThis is my first article in what I'm hoping will be a series of articles on system programming for POSIX compliant operating systems with focus on Linux. Actually I've touched this topic a while ago when I wrote three articles about library programming on Linux (static libraries, dynamic libraries and dynamic libraries using POSIX API). In this series my goal is to go trough basics of Linux system programming from the easiest topics like open file, read file and file write to a bit more complicated things like Berkeley sockets network programming. So lets get started with environment setup and an example of program that copies source file into destination file using POSIX API system calls to demonstrate open(), read() and write() system calls on Linux operating system.

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Ubuntu LTSP server for booting thin clients over network using PXE

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LTSP diagramNot so long ago I've discovered few bad sectors on one of my machines hard disk. The failing component warranty hasn't expired but I was reluctant to take it back to my hardware dealer because that would make this machine unusable until the whole process is finished. Hard disk device in question is currently in my hardware dealers hands an I'm waiting for replacement but that hasn't stopped me from writing this article using diskless machine in question. In this article I'll show you how to install LTSP (Linux Terminal Server Project) on your Ubuntu PC and how to configure this system for booting thin clients over network using PXE (Preboot Execution Environment).

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Manage GSM mobile broadband connections without Network Manager (Red Hat Linux, CentOS, Fedora)

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Red Hat LogoIn my last article I have described how to manage manage GSM mobile broadband connections without Network Manager on Debian based distributions like Ubuntu and Linux Mint.

In this article I will show you how to do the same on Red Hat Linux based Linux operating systems like CentOS and Fedora. I recommend that you read "Introduction" and "My hardware and ISP configuration" paragraphs from my last article to get acquainted with my exact hardware and Internet Service Provider configuration. Required procedure is a bit simpler for Red Hat Linux, CentOS and Fedora because there is some abstraction in accessing basic pppd options. Also Red Hat network configuration files are differently arranged (better than Debian in my opinion) and because of all that this article is a bit simpler to follow than it's Debian counterpart.

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