Monthly Archives: December 2020

Merry Christmas!

Kubernetes: How to create a custom resource with Kubernetes Operator, Kubernetes in DigitalOcean with Rancher, AKS Performance: Resource Requests and Limits, AKS Performance: Resource Quotas, AKS Performance: Limit Ranges, Non-Terminating Namespace Removal, OpenShift: Argo CD Namespace Isolation, Machine Learning Model

Posted in Others

Latest technical articles & videos.

Kubernetes: Don’t Panic: Kubernetes and Docker, Dockershim Deprecation FAQ, A Deep Dive into Kubernetes Scheduling, Kubernetes Tip: How Does OOMKilled Work? Using Fio to Tell Whether Your Storage is Fast Enough for Etcd, How to Restart All Pods in a

Posted in Others

CentOS is dead!

Yesterday, Red Hat announced that it is redirecting its efforts to CentOS Streams. While the end of life of CentOS 7 is unchanged and lasts until 2024, the end of life of CentOS 8 will expire at the end of

Posted in RHEL8

Recent technical articles & videos.

Kubernetes: Database migrations on Kubernetes using Helm hooks, Preparing before the storm: Migrating our monolith into Kubernetes, Monitoring the Beat microservices: A tale of evolution, Yet another Kubernetes DNS latency story, Role Based Access Control (RBAC), Kubernetes: ServiceAccounts, JWT-tokens, authentication,

Posted in Others

RHCSA7: Task of the day

Allowed time: 10 minutes.
Create two new user accounts "steve" and "oliver".
Create a group "team". Create a directory "shared".
All files put into the "shared" directory by "steve" or "oliver" should belong to the "team" group and be only visible by them.

RHCE7: Task of the day

Allowed time: 10 minutes.
Set up a default secure MariaDB database called maria and back up the database with mysqldump.

Follow me on Twitter

Poll for favorite RHEL 7 book

What is your favorite RHEL 7 book to prepare RHCSA & RHCE exams?

View Results

Loading ... Loading ...

Poll for most difficult RHCSA 7 topic

What do you think is the most difficult RHCSA 7 topic?

View Results

Loading ... Loading ...

Poll for most difficult RHCE 7 topic

What do you think is the most difficult RHCE 7 topic?

View Results

Loading ... Loading ...