credativ® Blog
Here you will find interesting news about industry-specific topics and us.
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Tag: Security
15 March 2022
Introduction to AppArmor
Fundamentally, access control under Linux is a simple matter: Files specify their access rights (execute, write, read) separately for their owner, their group, and finally, other users. Every process (whether a user’s shell or a system service) running on the system operates under a user ID and group ID, which are used for access control. […]
16 April 2020
Recover Data from Corrupt Tables in PostgreSQL®
PostgreSQL® is an extremely robust database, to which most of our clients also entrust their data. However, if errors do occur, they are usually due to the storage system, where individual bits or bytes flip, or entire blocks become corrupted. We demonstrate how to recover data from corrupt tables. In case of an error, the […]
18 April 2019
The XEN hypervisor and microcode updates
One would think that microcode updates are basically unproblematic on modern Linux distributions. This is fundamentally correct. Nevertheless, there are always edge cases in which distribution developers may have missed something. Using the example of Ubuntu 18.04 LTS “Bionic Beaver” in connection with the XEN Hypervisor this becomes obvious when it comes to processors microcode […]