Jan Reilink 
Windows Server
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To get and set File Server Resource Manager NTFS quota you now have to use PowerShell FileServerResourceManager cmdlets. It's pretty easy to get directory information with Get-FsrmQuota and change dirquota.exe using Set-FsrmQuota.
Windows Server
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By default, an IIS application pool (or "AppPool") recycles on a regular time interval of 1740 minutes, or 29 hours. One reason for this time interval is that application pools don't recycle at the same moment every day (every day at 07.00 for example).
Web applications
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A change in PHP's default_charset php.ini setting causes HTML output to break if you try to set a different charset in your HTML head. It also might break functions like htmlentities() and htmlspecialchars().
GNU/Linux
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Learn how to turn off swap in Bash, because when a swap partition is enabled Linux starts swapping, which may degrade (MySQL) system performance
Windows Server
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Here is how to install software packages during a Windows Deployment Services (WDS) deployment, without Microsoft Deployment Workbench (available in the Microsoft Deployment Toolkit, or MDT).
Windows Server
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Easily setting up a monitoring service for websites and services using Monit on Ubuntu/Hyper-V, following these steps.
Codebase
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Learn how to convert a PHP class using the old ext/mysql functions to MySQLi, one function at a time, with a list of MySQLi equivalents.
GNU/Linux
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Accidentally deleted an Open-Xchange context? Here is how to restore a deleted OX context and its filestore from your MySQL backups with restorecontext.
Useful
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Relive the golden age of PC gaming. Learn how to configure DOSBox on Windows 11 to run classic MS-DOS titles, optimize CPU cycles for period-accurate speed, and set up a custom autoexec.bat menu for easy launching.
Codebase
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Sometimes you need to find all files owned by a specific user, recursively on your Windows Server NTFS file system. PowerShell has some neat cmdlets to automate this task for you and here is how.
WordPress
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With thousands spam reactions, disabling (and removing) WordPress comments is often the only way to go. Here is how to disable WordPress comments in both the WordPress Dashboard interface and in your MySQL / MariaDB database.
Windows Server
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Utilize your cmd.exe or PowerShell command-line and use Deployment Image Servicing and Management (DISM) to clean up the Windows Component Store (WinSxS) in Windows Server.
Windows Server
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How to add DNS servers to a Windows Server network adapter using WMI, netsh and PowerShell, for both IPv4 and IPv6 addresses.
Windows Server
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ECN is an optional feature that may be used between two ECN-enabled endpoints when the underlying network infrastructure also supports it. Unfortunately, having one ECN Capability enabled endpoint may slow down outbound network connections to outdated network equipment.
Windows Server
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The other day, when I attempted to add a newly installed Active Directory to become the slave domain controller of a master, the error message "A domain rename operation is already in progress" was displayed. Promoting the Windows Server 2012 R2 server to a Domain Controller failed.
Security
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Joomla websites with the vulnerable Googlemaps plugin are abused as open proxy for DoS attacks. Here is how to block plugin_googlemap2_proxy.php.
GNU/Linux
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Cconvert decimal to hex hexadecimal to decimal and Unix timestamps in Linux Bash. A quicky for my archives.
Web applications
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How to set up a global Geolocation DNS load balancing Varnish Cache Content Delivery Network with Bind9, geo-ip database, Varnish Cache and DigtalOcean. DIY High-Availability for your website!
Web applications
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Learn how to optimize PHP performance by checking and setting PHP realpath_cache_size. The realpath_cache_size size represents the total number of bytes in the path strings stored, plus the size of the data associated with the cache entry
Web applications
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Use a PHP redirect script to redirect old PHP URLs to new ones. This examples uses a 301 Moved Permanently redirect, perfect for SEO.