credativ® Blog
Here you will find interesting news about industry-specific topics and us.
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06 January 2022
PostgreSQL and Undelete
pg_dirtyread I recently updated pg_dirtyread to work with PostgreSQL 14. pg_dirtyread is a PostgreSQL extension that allows reading “dead” rows from tables, i.e., rows that have already been deleted or updated. Of course, this only works if the table has not yet been cleaned by a VACUUM command or autovacuum, PostgreSQL’s garbage collection. Here is […]
17 November 2021
Debian 11 "Bullseye" Released
Congratulations to the Debian Community The Debian Project just released version 11 (aka “bullseye”) of their free operating system. In total, over 6,208 contributors worked on this release and were indispensable in making this launch happen. We would like to thank everyone involved for their combined efforts, hard work, and many hours pent in recent […]
22 June 2021
Self-hosted Yubico OTP
In the preceding article, Two-Factor Authentication with Yubico OTP, we demonstrated how quickly existing services can be extended with two-factor authentication (2FA) using Yubico OTP with the help of the PAM module pam_yubico. The validation service used, the YubiCloud, is provided by Yubico free of charge. However, the fact that you are bound to an […]
04 May 2021
Moodle PostgreSQL load balancing with HAProxy and Patroni
Moodle is a popular Open Source online learning platform. Especially since the beginning of the COVID-19 pandemic the importance of Moodle for schools and universities has further increased. In some states in Germany all schools had to switch to Moodle and other platforms like BigBlueButton in the course of a few days. This leads to […]
10 December 2020
Create QR Codes for TOTP Secrets
The article Two-factor authentication for OpenSSH and OpenVPN presented a simple way to increase the security of PAM-enabled services through two-factor authentication. The TOTP method used generates a one-time password that is valid for a limited period of time based on a shared secret. Depending on the method and encoding, the shared secret consists of […]