Knowledge Base

Apps

• Updating Roundcube (2021-01-18)

CentOS

• Additional PHP versions on CentOS (2021-08-20)

Debian

• Upgrading Debian 8 ("Jessie") to Debian 9 ("Stretch") (2020-07-02)
• Upgrading Debian 10 ("Buster") to Debian 11 ("Bullseye") (2021-08-20)
• Upgrading Debian 11 ("Bullseye") to Debian 12 ("Bookworm") (2023-05-04)
• Upgrading Debian 9 ("Stretch") to Debian 10 ("Buster") (2024-09-20)
• Additional PHP versions on Debian/Ubuntu Linux (2025-04-07)

DNS

• Using DNSSEC (2020-08-18)
• Enable logging with BIND (2022-02-15)
• Using DANE/TLSA (2022-09-14)
• Using DKIM (2024-01-24)
• DNSSEC Migration (2025-04-09)

E-Mail

• Using DANE/TLSA (2022-09-14)
• Using DKIM (2024-01-24)
• Improving Spam Filtering (2025-03-10)

General

• Disaster Recovery (2021-03-10)

Linux

• Configuring File System Quota (2019-10-31)
• Server Tuning (2020-03-03)
• Server Security (2020-08-31)
• CPU usage explained (2021-08-26)
• Versions of Software Packages (2025-04-08)

LiveConfig

• Using the IFRAME API (2020-04-14)
• LiveConfig & DRBD (2020-12-09)
• Securing LiveConfig with Let's Encrypt (2021-05-05)
• Running LiveConfig behind a proxy (2021-05-05)
• Site.pro Website Builder (2021-05-25)
• Security Announcements (2021-12-07)
• Repairing a SQLite database (2022-05-17)
• Moving from SQLite to MySQL (2024-09-16)
• LiveConfig 3 - REST API (2025-05-08)

MySQL

• Error "Can't connect to /tmp/mysql.sock" (2020-08-13)
• MySQL Single Sign-On with phpMyAdmin (2020-09-16)
• MySQL 8 (2020-12-22)

SSL

• Using the Let's Encrypt Staging Environment (2019-11-20)
• Tips for SSL/TLS configuration (2022-07-06)

Ubuntu

• Additional PHP versions on Debian/Ubuntu Linux (2025-04-07)