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Last updated on 17 Feb 2025
Published on 14 Oct 2024
Prev - Proxmox after install
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Proxmox
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Proxmox after install
Containers
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Containerd
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How to run and manage containers using ctr
How to use nerdctl if you are familiar with Docker CLI
How to work with container images using ctr
Portworx
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Portworx cheatsheet
Harbor
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Harbor
Helm
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Helm
Kubernetes
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Kubernetes cronjob
How to trigger a Kubernetes cronjob manually
ConfigMap
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Mounting a ConfigMap to an Existing Volume in Kubernetes
Updating a ConfigMap
Scheduling
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nodeSelector and nodeAffinity
PodAffinity
Taint and Tolerations
Kubernetes: Evenly Distribution of Pods Across Cluster Nodes
Canary testing
Life Cycle Management
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Kubent
Kubernetes rollout history and rollback
Network Policies
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Kubernetes Network Policy Recipes
Kubernetes Network Policies
Role Based Access Control RBAC
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Creating A Kubernetes Service Account To Run Pods
Kubernetes Role Based Access Control RBAC
Authorization
Kubernetes namespace deleting stuck in Terminating state
kubectl error: You must be logged in to the server (Unauthorized) – how to fix
Backup and Restore Kubernetes ETCD database
Clean up old containers and images in your kubernetes cluster
Kubernetes CheatSheet
Kubernetes Pod Security Policies explained
Kubernetes copy data between pvc
Kubernetes pvc deleting stuck in Terminating state
Easy way to change namespace in Kubernetes
Pull an Image from a Private Registry
Check PVC usage
Kubernetes NodePort vs LoadBalancer vs Ingress
externalTrafficPolicy
Quota's, Limits and Resources
Upgrade Kubernetes
Volumes
Generate TLS Secret for kubernetes
Update cluster DRAFT - NOT TESTED
Kubernetes
Docker
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GoLang: Using multi-stage builds to create clean Docker images
Docker
Docker CMD vs ENTRYPOINT
Docker Swarm
Docker run in background
Docker: determining container responsible for largest overlay directories
Docker exec into container
Docker logging
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Nexus database restore
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Python 3.11, pip and (breaking) system packages
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Using VSCode over SSH
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Running Docker on WSL2 without Docker Desktop
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Testing
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Siege
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Source
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Redis
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Redis
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Splunk
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Terraform
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Quemu
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Jenkins dump credentials
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Send messages via mail and Slack
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Jenkins docs
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Script to automaticaly install plugins in Jenkins.
Jenkins create git webhook
Jenkins use git submodule with declarative pipeline
Jenkins create git pipeline
Jenkins sources
Monitoring
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Alertmanager
Netdata
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Prometheus
Test
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Chapter 1
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Chapter 1-1
Chapter 1-2
Chapter 1-3
Chapter 1-4
Chapter 2 (weighted)
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Chapter 2-3 (weight: 10)
Chapter 2-4 (weight: 20)
Chapter 2-2 (weight: 30)
Chapter 2-1 (weight: 40)
Chapter 3 (hierarchized)
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Chapter 3-1
Chapter 3-2
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Chapter 3-2-1
Chapter 3-2-2
Chapter 3-2-3
Chapter 3-2-4
Chapter 3-3
Chapter 3-4
Sample Document
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Build-in Shortcodes
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Table of Contents
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Performance Test
Blaataap
test
Ansible
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Running Ansible through SSH Jump / Bastion Host
Ansible add block to file
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Ansible course notes
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Ansible remove line from file
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Ansible set permissions of file
add iptable rule
Ansible cfg hierarchy
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Ansible execute a role with condition
Ansible fail if condition fails
Ansible force ansible version
Ansible idempotently change file attributes
Ansible patch single package
Ansible patching or using forked version ansible galaxy role
Ansible pipelining
Ansible register shell output
Ansible run playbook
Ansible with items key and value
Better CLI experience
Cheatsheet
Cloning private GitHub repositories with Ansible on a remote server through SSH
Certificates
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Certificates Kubernetes
SAN Certificates
Show Certificate info
Certificates
Git
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Quickly import your ssh public keys from Github with ssh-import-id
Unfork a repo on GitHub
Clean up old git branches
Compare encrypted git files
Git errors and how to solve them
How to compare two git branches
Show current git branch with colors in Bash prompt
Git tips
GitHub SSH auth
Linux
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Ubuntu
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How to Enable Minimize on Click on Ubuntu
Split a file in blocks and do something with each block
Hot add memory
How to convert JPG to PDF in Linux
Create Password Protected ZIP in Linux
awk
sed
Find
Memory
Base64 encode/decode
Network NMCLI
Cron
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vi2
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dd
Empty mailq
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Sar issue
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Puppet
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Hiera
Mcollective
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Puppet Duplicate Resources with PuppetDB
Ubuntu
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Always connect VPN Ubuntu 19.10
Pulse Audio Bluetooth codecs
Varnish
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Varnish Cheat sheet
Varnish Purge
varnishlog
Markdown
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