DevOps Engineer Tutorials
DevOps Engineer tutorials guide you from Linux fundamentals to Docker, Kubernetes, CI/CD, and cloud-native workflows. Topics cover automation, containerization, deployment pipelines, and infrastructure practices. Free labs and guided examples help you build junior DevOps skills in an interactive environment.
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Backfill Pickup Choices Before Tightening Rules
Apply approved historical pickup choices, reject incomplete mappings and preserve both old and new MySQL checkout contracts.
MySQL
Expand an Order Schema for Pickup Options
Extend a MySQL order table for new pickup choices while preserving legacy writes and observing real DDL commit boundaries.
MySQL
Invalidate the Price After a Committed Write
Keep a Redis price cache useful with precise post-commit invalidation and honest expiry behavior.
RedisPython
Give Cached Prices a Clear Identity and Lifetime
Build a Redis price cache with complete identity, real cache hits and a finite fill lifetime.
RedisPython
Tune Two Order Lookups
Tune two reusable MySQL order lookups with useful indexes while preserving exact rows and sharing a two-index budget.
MySQL
Keep Every Order Across Pages
Add complete timestamp-and-ID cursors to MySQL order queries for correct ascending and descending pagination.
MySQL
Protect Workshop Registration Rules
Keep a working MySQL registration desk consistent without confusing same-name people or losing existing bookings.
MySQL
Move the Site Without Changing Its Name
Prepare a real DNS transition, move a community site to its new address, and preserve the old service.
LinuxShell
Reconnect the Workshop Check-in Client
Find the current workshop service with a scoped Nmap scan, distinguish it from an archive, and reconnect a real roster client.
NmapShell
Check an Update Against Its Network Change Plan
Compare a real Nmap baseline with current services, distinguish approved changes from faults, and deliver a business-aware review.
NmapShell
Check the Venue Access Agreement
Use Nmap from two real network positions, identify unexpected access and unavailable required services, and deliver a complete review.
NmapShell
See Which Address a Client Is Using
Follow a real community site through authoritative DNS and a client cache, then observe natural TTL expiration.
LinuxShell
Serve the Same Guide to IPv4 and IPv6 Clients
Extend a working event guide with native IPv6 listening and correct AAAA, then use every page and download through both address families.
LinuxShell
Reach the Other Festival Area
Add the missing forward route to Workshop, retrieve its real programme, and preserve local and broadcast service.
Linux
Measure What Each Event Task Needs
Compare real delay and TCP upload throughput over two isolated event links, then read actual delivery receipts.
Linux
Put Each Task on the Right Link
Use measured path differences to route score updates and deliver complete audio to their correct event receivers.
Linux
Give the Reply a Way Back
Observe real TCP request and reply packets, repair the missing return route, and preserve original festival services.
Linux
Make the Update Fit
Finish a real shop update within a fixed CPU quota while preserving the required available replicas and reference service.
KubernetesLinux
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