Solve infrastructure problems.
Practical DevOps runbooks, guides & tools for developers, DevOps engineers, and infrastructure teams.
Featured Runbooks
Start with a repeatable diagnosis process instead of guessing.
Kubernetes CrashLoopBackOff
A practical diagnosis flow for repeatedly crashing pods.
Open runbook →MEMLinux High Memory / OOM
Prove an OOM event, identify memory pressure and fix the workload or capacity problem.
Open runbook →DSKLinux Disk Usage
Trace filesystem pressure to the directory, file or process responsible.
Open runbook →DevOps Tools
Small, focused utilities that solve real infrastructure problems.
IPv4 CIDR Calculator
Calculate networks, masks, host ranges and broadcast addresses.
Open tool →{ }YAML Toolkit
Validate, format and convert YAML and JSON safely in your browser.
Open toolkit →TIMEEpoch Time Converter
Convert Unix epoch timestamps to human time and human dates back to epoch.
Open converter →Practical Guides
Networking, Docker and Git references built around real operational tasks.
CIDR & Subnetting for DevOps
Understand prefixes, masks, ranges and subnet sizing with practical examples.
Read guide →NETLinux Network Troubleshooting
A layered workflow for interface, route, DNS, port and application failures.
Read guide →LOADLinux Load Average Explained
Build an intuitive mental model for 1, 5 and 15 minute load, then learn what Linux is really counting.
Read guide →TOPUnderstanding Linux top
Decode load, CPU, memory and process fields with realistic output and interview-focused explanations.
Read guide →DOCDocker tzdata Timezone Prompt
Fix interactive timezone prompts and understand matching docker build arguments.
Read guide →GITMultiple GitHub Accounts
Use separate SSH keys and conditional Git identities on one machine.
Read guide →DevOps, without the noise.
Kubernetes · Docker · Linux · AWS · Terraform · CI/CD · Networking · Observability