GNU/Linux
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Turn off swap
Learn how to turn off swap in Bash, because when a swap partition is enabled Linux starts swapping, which may degrade (MySQL) system performance
Jan Reilink
Windows Server
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Software deployment through WDS
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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Monit monitoring on Ubuntu 14.04 VM on Hyper-V
Easily setting up a monitoring service for websites and services using Monit on Ubuntu/Hyper-V, following these steps.
Useful
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How to play classic MS-DOS games on Windows 11 with DOSBox
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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Find all files owned by a particular user using PowerShell
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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Disable WordPress comments (how-to)
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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Disk Cleanup in Windows Server
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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Explicit Congestion Notification (ECN) slows down outbound connections
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 Unfortunately, having one ECN Capability enabled endpoint may slow down outbound network connections to outdated network equipment.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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“A domain rename operation is already in progress”
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.
GNU/Linux
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Convert decimal to hex in Bash, hexadecimal to decimal and dates to Unix timestamp
Cconvert decimal to hex hexadecimal to decimal and Unix timestamps in Linux Bash. A quicky for my archives.
Web applications
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Sysadmins of the North goes global!
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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How to set a good PHP realpath_cache_size
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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Redirect old URL to new URL or send 404 page with PHP
Use a PHP redirect script to redirect old PHP URLs to new ones. This examples uses a 301 Moved Permanently redirect, perfect for SEO.
WordPress
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Display Commas in WordPress tags
How to display commas in WordPress tags? And why have commas in WP taxonomies?
Windows Server
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Conditionally start Application Pools on remote IIS web servers
In this article you’ll learn how to start all stopped application pools that have the ApplicationPool.AutoStart property set to $True using AppCmd.exe or PowerShell. This is something you often or occasionally have to perform on various servers, for example when an application pool hangs.
Useful
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Check website availability with PHP and cURL
A useful PHP script to check if your website is up and online available. It uses PHP and cURL. This script comes in handy because website uptime and availability is important, and you want your website to be always online available.
Web applications
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Exploit PHP’s mail() to get remote code execution
Exploit PHP’s mail() function for remote code execution. Apparently, if you are able to control the 5th parameter of the mail() function ($options), you have the opportunity to execute arbitrary commands.
Web applications
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Custom PHP version on IIS Express and WebMatrix 3
Outdated but fun: PHP 7 with OPcache in IIS Express for Microsoft WebMatrix 3: create your DevOps with Microsoft WebMatrix and IIS Express
WordPress
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Send authenticated SMTP email over TLS from WordPress
Learn how to override wp-mail() and send secure email using authenticated SMTP and StartTLS from WordPress.
WordPress
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Huge increase in WordPress xmlrpc.php POST requests
How to identify, block, mitigate and leverage xmlrpc.php scans, brute-force, and user enumeration attacks on WordPress sites… Secure WordPress xmlprc.php interface and reduce service disruption.