DevOps Daily Tips

Bite-sized, actionable DevOps tips you can apply immediately. One new tip every day.

All Tips

☸️Day 13Beginner

Switch Between Clusters with kubectl Contexts

One wrong context means running production commands on the wrong cluster.

Feb 13, 20261 min read
kuberneteskubectlconfiguration
πŸ”€Day 12Intermediate

Recover Lost Commits with Git Reflog

Git reflog is your undo button β€” it can recover commits you thought were gone forever.

Feb 12, 20261 min read
gitrecoverydebugging
🐳Day 11Beginner

ENTRYPOINT vs CMD β€” Know When to Use Each

Using the wrong instruction means your container either can't be customized or doesn't behave like a proper executable.

Feb 11, 20261 min read
dockerdockerfilebest-practices
🐳Day 10Beginner

Use .dockerignore to Speed Up Builds and Protect Secrets

Without .dockerignore, you're sending node_modules, .git, and maybe even .env secrets into your image.

Feb 10, 20261 min read
dockersecurityperformance
πŸ’»Day 9Beginner

Stop Killing Processes Wrong β€” Use Signals Properly

kill -9 is a last resort, not the first move β€” it can corrupt data and leave orphaned processes.

Feb 9, 20261 min read
linuxtroubleshootingbest-practices
☸️Day 8Intermediate

Liveness vs Readiness Probes β€” Know the Difference

Using the wrong probe type causes either endless restarts or traffic sent to broken pods.

Feb 8, 20261 min read
kubernetesreliabilitybest-practices
πŸ”„Day 7Beginner

Cut CI/CD Pipeline Time in Half by Caching Dependencies

Your pipeline re-downloads the same packages every single run β€” caching stops this waste.

Feb 7, 20261 min read
cicdperformancegithub-actions
πŸ”€Day 6Intermediate

Find the Exact Commit That Broke Your Code with Git Bisect

Git bisect binary-searches through 1,000 commits to find the broken one in just 10 steps.

Feb 6, 20261 min read
gitdebuggingtroubleshooting
🐳Day 5Intermediate

Shrink Docker Images by 90% with Multi-Stage Builds

Multi-stage builds can significantly reduce image size by stripping out everything you don't need at runtime.

Feb 5, 20261 min read
dockerperformancesecurity
πŸ’»Day 4Beginner

Find What's Eating Your Disk Space in Seconds

A full disk at 2am is every SRE's nightmare β€” these two commands prevent it.

Feb 4, 20261 min read
linuxtroubleshootingdisk-management
☸️Day 3Beginner

Always Set Resource Limits in Kubernetes

Without resource limits, one runaway pod can starve your entire cluster.

Feb 3, 20261 min read
kubernetesbest-practicesreliability
πŸ”€Day 2Intermediate

Clean Up Messy Git History by Squashing Commits

Squashing commits turns 'fix typo', 'oops', 'actually fix it' into one clean, meaningful commit.

Feb 2, 20261 min read
gitbest-practicescollaboration