Category Archives: Operating System

An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs ( Wikipedia )

CentOS Exim Mail Server Sanity Check Testing Tutorial

To send an email often relies on a Mail Server and accompanying software and hardware and networking to support just such a Mail Server. Here at our Linux web server (CentOS) here at RJM Programming we oversee an Exim Mail … Continue reading

Posted in Ajax, eLearning, Hardware, Networking, Operating System, Software, Tutorials | Tagged , , , , , , , , , , , , , , , , | Leave a comment

Troubleshooting MySql Query Error Tutorial

Please see the parallels with the previous Troubleshooting Landing Page Crontab Curl Tutorial as we review a “same fix” “different symptom” regarding diskspace on our RJM Programming domain Apache/PHP/MySql web server … Let’s go over the symptoms found with our … Continue reading

Posted in Database, eLearning, Operating System, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , | Leave a comment

Troubleshooting CentOS Web Server Logfile Diskspace Issue Tutorial

When it comes to categorizing the nature of major issues maintaining our RJM Programming domain’s CentOS Linux web server it’s easy to tell you what is top of the list … diskspace … both concerning … inode limits (a Linux/Unix/macOS … Continue reading

Posted in eLearning, Operating System, Tutorials | Tagged , , , , , , , , , , , , , , | Leave a comment

Video iPad Time Lapse Animated GIF via ffmpeg Tutorial

We wanted to try out a small Time Lapse video … Time-lapse photography is a technique whereby the frequency at which film frames are captured (the frame rate) is much more spread out than the frequency used to view the … Continue reading

Posted in Animation, eLearning, Operating System, Software, Tutorials | Tagged , , , , , , , , , , , , , | Leave a comment

Windows File Server and File Sharing Inaccessible Troubleshooting Tutorial

Businesses and schools around the world benefitted from the invention of the networking idea of a file server as we discussed with the previous Windows File Server and File Sharing Primer Tutorial, and we’ll let Wikipedia explain below … The … Continue reading

Posted in eLearning, Hardware, Networking, Operating System, Software, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Swift Playgrounds on iPad Primer Tutorial

Generally speaking around here, we tend to think you need at least a laptop (eg. MacBook Pro) or desktop computer PC (macOS or Windows) or Linux operating system arrangement, to (computer) program (in other words, the iOS operating system is … Continue reading

Posted in eLearning, Hardware, Installers, iOS, Operating System, Tutorials, Xcode | Tagged , , , , , , , , , , , , , , , , , , | Leave a comment

PHP Passthru Output Buffering Verb Tutorial

Yesterday’s PHP Passthru Output Buffering Security Tutorial set up a framework for our tightened “defence” of our “Passthru” (PHP) web application woooooooorrrrrrrrlllllld view, but there is scope, still, to improve the “offence”, a move which affects “defence” as well (wouldn’t … Continue reading

Posted in eLearning, Operating System, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

PHP Passthru Output Buffering Security Tutorial

Serverside web applications (such as this current PHP one), more so than purely clientside web applications, are a bit like a lot of sports … there is the “offence” functionality side that provides a product or service to the user … Continue reading

Posted in eLearning, Operating System, Tutorials | Tagged , , , , , , , , , , , , , , , , , , , , | Leave a comment