Skills
General-purpose programming languages
Query languages
SQL
Markup languages
Stylesheet languages
Scripting languages
Data interchange formats
Lightweight markup languages
Template systems
eRuby
Frameworks
E-commerce
Help desks
Databases
LMDB
BDB
Database administration
MongoDB Compass
Backup tools
mysqldump
mariadb-dump
Duplicity
Synology Cloud Sync
Synology DiskStation Manager
VCS
Deployment
Code editors
API
SOAP
REST
Productivity & collaboration platforms
Network security and tools
openssl
SSH
SFTP
Web servers
HTTP & HTTP/2 & HTTP/3 + QUIC
H2O
App servers
uWSGI
Web cryptography
TLS 1.3
SNI
HSTS Preload
OCSP stapling
ACME
ECC
Cipher suites
ssldump
Cloud service providers
CMS
DNS
DNSSEC
DNS over TLS/QUIC
DNS CAA
DNSControl
Operating systems
Package managers
NPM
APT
pacman & pikaur
Emailing
SMTP/SMTPS
IMAP/IMAPS
FTS Flatcurve
DKIM
MTA-STS
PTR
SVG Tiny P/S
SNDS & JMRP
Regular expressions
Capturing groups
(Double) escaping
Negative lookahead
Negated character class
Greedy and lazy quantifiers
Global pattern flags
PCRE2 syntax
REGEXP_REPLACE function
Design