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Deploy an application in Red Hat OpenShift on your laptop
![Containers](/sysadmin/sites/default/files/styles/full/public/2019-12/Containers%20Cropped.jpg?itok=1lpy61Ho)
"Containers" by Jim Bahn is licensed under CC BY 2.0
How to install Red Hat OpenShift Local on your laptop
![Containers](/sysadmin/sites/default/files/styles/full/public/2019-12/Containers%20Cropped.jpg?itok=1lpy61Ho)
"Containers" by Jim Bahn is licensed under CC BY 2.0
No wizardry needed to use Ansible's magic variable 'hostvars'
Use Redfish to manage servers automatically
![Photo illustration showing an outline of a person's head filled with gear shapes over a blue background](/sysadmin/sites/default/files/styles/full/public/2023-04/automation-gears-person.jpg?itok=CdqlUudm)
Image by Gerd Altmann from Pixabay
![A blue cable plugged into a green Raspberry Pi](/sysadmin/sites/default/files/styles/full/public/2022-10/blue-network-cable-raspberry-pi.jpg?itok=5RGioeqT)
Photo by Gavin Allanwood on Unsplash
In Stop using Telnet to test ports, I explored several alternative commands and scripts to test TCP connectivity. These commands and scripts range from basic tests to more sophisticated checks, but they are limited to the features provided by supporting tools like Netcat.
![Laptop keyboard with Ethernet patch cable](/sysadmin/sites/default/files/styles/full/public/2020-12/keyboard-network-cable-return-key.jpg?itok=hZ0VNErZ)
Image by Michael Schwarzenberger from Pixabay
Most sysadmins know what Telnet is. Before more robust and secure alternatives like Secure Shell (SSH) appeared, Telnet was the most common way to access remote systems. The Telnet protocol is not encrypted, which is why people no longer use it to provide access to a server. Instead, people use it to check whether a service is listening on a given port, like this: telnet $machine $port
. For example:
Enabling Kubernetes self-service the operator way
![Colorful cubes](/sysadmin/sites/default/files/styles/full/public/2021-02/colorful-cube-containers.jpg?itok=E4QP0_N7)
Image by lisa runnels from Pixabay
How to get started with Ansible Private Automation Hub
![Photo illustration showing an outline of a person's head filled with gear shapes over a blue background](/sysadmin/sites/default/files/styles/full/public/2023-04/automation-gears-person.jpg?itok=CdqlUudm)
Image by Gerd Altmann from Pixabay
In August 2022, Dan Walsh (one of the authors of this article) moved out of his role as container runtimes architect at Red Hat to architect for the Red Hat Enterprise Linux (RHEL) for Edge team. Specifically, he has moved to the Red Hat In-Vehicle Operating System (RHIVOS) Containers On Wheels (COW) team.
![Magnifying glass with green background](/sysadmin/sites/default/files/styles/full/public/2021-06/magnifying-glass-search-find-green.jpg?itok=XjUrfDU2)
Image by Lucas Wendt from Pixabay
Imagine you are trying to determine why one of your applications is not performing well. The application logs do not show a specific issue and by the time you checked the server, the problem is gone.
Most likely, you would want to record performance for a given period of time to see what metrics deteriorated on the machine. But you don't have a dedicated agent to take care of that.