I try to bookmark stuff but always end up losing the bookmarks, so I just note them here (when I remember to do so!).
Most of these links are quite old but probably still relevant in most cases.
Creating custom ESXi firewall rule
MySQL log is in the future - fix
MySQL select and calculate value from multiple columns
How to Change a Column Name in MySQL
Add a column to an existing MySQL table
Ohms law calculator (+ other calculators)
HTML & CSS
Various CSS Input Text Styles (and labels)css center div inside container?
Replace invalid image url with 404 image
Linux & BSD
Blocking multicast traffic with iptables
ShellCheck - check shell scripts
Simple server monitoring with xinetd
Converting string to lower case in Bash shell scripting
Bash - test if a variable is a number
Add character to the beginning of each line using sed
Verify Successful Replication to a Domain Controller
Exchange versions (2013 related)
Launch control panel apps command line
More on control panel launching
How do I make a PHP form that submits to self?
How to check if a string contains a specific word in PHP?
Keeping Navigation Current With PHP
Remove directory from glob() results
PHP – strip leading slashes, strip trailing slashes
PHP Variables, Functions, Arrays, and Loops
Handling a PHP unserialize offset
Best way to do a PHP switch with multiple values per case?
How to create dynamic header for tables in php
Encode and store multiple variables in URL
Check if directory exists, make directory
Retrieve the list of all jpg files in a directory
BMW parts lists
download images from google with command line