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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
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Tagged Ajax, CentOS, command line, email, exim, FormData, Linux, log, Mail, mail server, mailto, PHP, sanity check, test, testing, tutorial, web server
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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
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Tagged command line, configuration, crontab, curl, diskspace, ImageMagick, ksh, landing page, Linux, MySql, phpMyAdmin, query, remote access, script, SQL, ssh, troubleshoot, troubleshooting, tutorial, web server
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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
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Tagged CentOS, command line, crontab, disk, disk space, diskspace, domain, fix, inode, Linux, operating system, ssh, troublesoot, tutorial, web server
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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
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Tagged animated gif, animation, Camer, ffmpeg, image, iPad, Mac OS X, Macbook Pro, macOS, open source, slide, time lapse, tutorial, video
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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
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Tagged client/server, command line, connect, disconnect, DOS, drive, error, file, file server, inaccessible, IP address, map, Mapping, net use, network drive, operating system, ping, troubleshoot, tutorial, UNC, Windows, Windows 10
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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
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Tagged Apple, device, hardware, IDE, ingrfedients, iOS, iPad, macOS, mobile, mobile app, programming, Python, pythonista, reciope, robotics, Swift, Swift Playgounds, tutorial, Xcode
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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
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Tagged action, buffer, command line, curl, dropdowm, form, function, genericization, get, hardcoding, MAMP, method, ob_get_contents, ob_start, output buffer, passthru, PHP, post, programming, security, select, stop press, switches, tutorial, validation, verb, virtue signal, whatis
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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
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Tagged buffer, command line, curl, form, get, MAMP, method, ob_get_contents, ob_start, output buffer, passthru, PHP, post, programming, security, stop press, switches, tutorial, validation, virtue signal, whatis
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I like the single-row radio-play approach for keeping the controls compact while still making each selection clear. When I’m checking a calculation alongside a tutorial, I use StepStat to see the intermediate steps; how do you handle the layout when the playlist gets much longer?