linux

ubuntu: authentication is required to create a color profile/managed device

This is a solution I found at https://devanswers.co/how-to-fix-authentication-is-required-to-create-a-color-profile-managed-device-on-ubuntu-20-04-20-10/ while trying to solve this annoying problem. Save it! “… Now reboot Ubuntu and try logging in again over RDP / Windows Remote Desktop and the popups should be gone ….“

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linux · openstack

openstack: delete unused volumes

aws · cloud · IBM Cloud · linux

ibm cloud: push files to an object storage with AWS CLI

cloud · container · IBM Cloud · linux · macos

docker: monitor the execution of N containers

I had to monitor the execution of N containers that were collecting data from multiple accounts at IBM Cloud. Here, each container is simulation the process to collect the data, one container per account:

cloud · container · kubernetes · openshift · power · ppc64le · tekton

tekton: no endpoints available for service “tekton-pipelines-webhook

If you see an error like the above one during your Tekton deployment, you can use the steps provided here to fix it. Issue: Solution:

cloud · container · docker · github actions · linux · power · ppc64le · x86_64

CICD: building multi-arch container images with GitHub Actions

The world is multi-arch and you can easily leverage it!

linux · PostgreSQL

PostgreSQL: iterate over all tables and calculate the avg for a given column

linux · openstack · ppc64le

ppc64le: installing openstack CLI on RHEL 8.x

container · docker · linux

docker: delete containers running for a long time

If you need to delete running containers based on their lifetime, this handy combination of commands can help you. It deletes all containers running for more than 2 hours. HOUR=2docker ps –filter “status=running” | grep hours | awk ‘{if ($4 >=$HOUR) print $1,”must be deleted”; system(“docker rm -f ” $1)}’

linux · ppc64le · rhel

ppc64le: building a custom version of grub2

If you need to test a custom version of grub2 you can follow the steps bellow to build the necessary packages for RHEL8 (it should also work on CentOS and Fedora):