This site

• DNSSEC
• Mozilla Observatory
• SSL

Software engineering

• The C10K Problem
• Git Workflow

IT Administration and Security

• Einen TLSA-Record für DANE mit Bind 9 publizieren [german]
• Gentoo Wiki: LXC
• Gentoo Wiki: Security Handbook
• Perfect Forward Secrecy (PFS) für Postfix und Dovecot [german]
• The Linux Documentation Project: Unicode
• Yubikey Guide, sub-keys
• ed25519 on gpg
• gist: DNS-over-HTTPS with nginx
• pgp, ssh keys on Yubikey NEO

Emulators

• GPU passthrough_with_libvirt_qemu_kvm
• Installing MS-DOS on Qemu

Cheatsheets

• LSIMegaRAIDSAS commands

Friends and Projects

• InspIRCd
• Minecraft Server
• OtakuboX
• euIRC
• k4cg