Below is an alphabetical listing of the techniques that I have experience in.
To keep it simple, there are four lists: one for each level of competency


I’m an expert, I know it inside and out

Ansible Infrastructure as code
AJAX Asynchronous JavaScript and XML
Alma Linux Open source Linux distribution
Apache The most popular HTTP server software
CentOS Community ENTerprise Operating System
Fedora Community-supported OS, sponsored by Red Hat
Hosting Managing shared hosting servers and dedicated servers
jQuery Cross-browser JavaScript library
JS JavaScript, client-side scripting in the web browser
LAN Managing network infractructure in data centers
Linux Operating systems that use the Linux kernel
MacOS Operating system for Apple Macintosh computers
Magento Open Source eCommerce/WebShop system
MySQL My Structured Query Language
Ogone International Payment Service Provider
Perl Practical Extraction and Report Language
PHP PHP: Hypertext Preprocessor
RHEL RedHat Enterprise Linux
Ubuntu Operating system based on Debian GNU/Linux
Varnish HTTP accelerator designed for content-heavy dynamic web sites
WordPress Open source CMS / blog publishing application


Extensive experience

Bash Bourne-again shell / scripting language
HAProxy Open source TCP/HTTP load balancer
HT Engineering High Traffic websites
HTML HyperText Markup Language
iDeal Nederlandse standaard voor internetbetalingen
Lighttpd Web server optimized for speed-critical environments
MsOffice Microsoft Office, multiple versions
Munin System,network and infrastructure monitoring
Nagios Monitoring and alerting
Nginx Reverse proxy, Load balancer, HTTP cache, and web server
Plesk Parallels Plesk Control Panel / Server Administrator
Shopware e-Commerce Platform
TT Template Toolkit
ZF Zend Framework


I can properly work with

CloudStack Virtualisation Platform
CSS Cascading Style Sheets
Hardware Reparing desktop, laptop and server computers
Joomla Open source content management system (CMS)
Juniper Juniper Networks Edge Routers (BGP)
Symfony PHP Application framework
VMware Virtualization software / hypervisor
XML Extensible Markup Language


I worked with it for some time or some time ago

AS Action Script, programming language of Adobe Flash
Batch DOS Batch file scripting
Cisco Network routers by Cisco Systems
HA Engineering High Availability systems
Oracle DB Object-relational database management system
SOAP Simple Object Access Protocol
Solr Open source enterprise search platform from the Apache Lucene project
XSD XML Schema Definition