Use apt changelog to inspect package changelog in Debian-based systems before upgrading.

Create a single or multi-node k3s Kubernetes cluster. k3s is a lightweight, CNCF-certified Kubernetes distribution packaged as a single binary, designed for resource-constrained environments.

Create a multi-node k0s Kubernetes cluster.

Retrieve VM IDs on a single node or across the entire cluster.

Create a single-node k0s Kubernetes instance. k0s is a lightweight, self-contained distribution packaged as a single binary with no external dependencies, making it straightforward to run a fully functional cluster on a single machine.

Update labels on a Docker Swarm service to migrate Docker Swarm service labels from Traefik v1 to v3

Display storage devices.

Extract the pre-installed Windows product key from the Microsoft Data Management table.

Create a visual tag cloud in Hugo with logarithmic font scaling based on tag frequency.

Match and control specific processes.

Automate APT logging with JSON using hooks.

Utilize SOPS with Age encryption to protect secrets inside git repository.

Funny netcat issue with additional X characters send over UDP protocol and why this is not a problem.

Protect the operating system against accidental shutdown or reboot.

I have already described how to inspect a pipeline, but today I will show you how to write a shell script that will help you reconstruct a whole pipeline when all you got is a process ID that is part of the pipeline.

These are easy mistakes to make as the bash builtin read command will terminate with the error exit code on the end-of-file condition and use Internal Field Separator to split the line into words. It is kind of tricky, but it is worth knowing how to deal with such problems.

Learn how to free dirty objects, page cache, and reclaimable slab objects for troubleshooting or instructional purposes.

The free utility is used to display the amount of free and used memory in the system. Debian Stretch provides an upgraded package. The output format has changed, and available memory is calculated using a different method, so let’s see what we can do with these modifications at this moment.

I often want to save a recently executed command to the personal log file for further reference, so let’s do it.