Introduction I came across a few warnings when I wanted to list the modules of an apache 2.4.7. server on an Ubuntu 14.04 server. Error 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 […]
Invalid Mutex directory in argument file Meer lezen »
When you use rrdtool, it can happen that you first create your databases, then collect a whole bunch of data and decide later you want more accuracy/longer periods. Especially when using zenoss (the monitoring solution I mostly work with at Kangaroot), which uses very conservative RRD settings by default (i.e. 5-minute intervals for only the
change RRDtool database without losing data Meer lezen »
With the release of Ubuntu 14.04 and the proliferation of PHP 5.5, there is going to be a migration away from Alternative Performance Cache (APC) and toward PHP’s new built-in OPcache. This is a logical move that seems destined for any interpreted language. As websites have become more and more complicated with many processes running,
Enable PHP 5.5 Opcache on Ubuntu 14.04 Meer lezen »
PHP has different functions which can be used to test the value of a variable. Three useful functions for this are isset(), empty() and is_null(). All these function return a boolean value. If these functions are not used in correct way they can cause unexpected results. isset() and empty() are often viewed as functions that
PHP isset() vs empty() vs is_null() Meer lezen »
Exchange server has a recipient filter that prevents mail submissions to accounts that are not in the GAL (Global Address List). First, let’s locate this configuration and then we’ll talk about how it works followed by thoughts about relay domains. How to enable this feature To enable this filter in Exchange 2003 you would visit
Backscatter blokkeren Meer lezen »
Als IPv6 nu al was doorgebroken, hadden we ze niet meer nodig, VPN verbindingen en inbel verbindingen. Helaas zijn deze verbindingen nu nog nodig om met een netwerk op afstand te verbinden. In de loop van de jaren heb ik heel wat VPN verbindingen in mijn lijst staan. Dit is erg vervelend als ik achter
Importeren en exporteren van Inbel en VPN instellingen in Windows 8 Meer lezen »
Bestanden van internet en andere mogelijk onveilige locaties kunnen virussen, wormen of andere soorten malware bevatten waardoor de computer kan worden beschadigd. Voor de bescherming van de computer worden bestanden van deze mogelijk onveilige locaties geopend in de beveiligde weergave. In de beveiligde weergave kunt u de risico’s verminderen terwijl u een bestand leest en
Beveiligde weergave wijzigen in office 2013 Meer lezen »
A few random tips for Arduino programmers. We cover saving RAM by storing text in program memory, making your programs easier to read, a technique to avoid being held up in delays, the C++ ternary operator and the watchdog timer.
5 tips for Arduino programs Meer lezen »
If you are one of the people who has installed ESXi on a bootable flash drive and then wanted to either erase the drive or start over, you might realize that Windows doesn’t like to give you permissions to format the entire flash drive. I ran into this situation a few months back and decided
How To Reformat a Bootable ESXi USB Flash Drive Meer lezen »
This HowTo describes how to install the transcoding tools under Ubuntu 14.04 For Open Source Transcoding you have to install the transcoding tools (MPlayer, mencoder, ffmpeg, flvtool2, faststart). As the Ubuntu packages do not support all required formats, we have to compile the required tools. In most cases please just copy & paste the code into
How to install the transcoding tools on Ubuntu 14.04 Meer lezen »