Product Engineering
Move uncommitted work off the wrong Git branch
Preserve staged, unstaged and untracked changes while creating the correct branch—and handle the harder case where that branch needs a different base.
Read note →FIELD NOTES
Practical technology,
explained like a conversation.
Tutorials, operational lessons and verified industry developments from the point where infrastructure, security and software meet.
134published notes
Databases & Reliability
Remove duplicate PostgreSQL rows—and stop them returning
Define duplicate identity, choose a deterministic survivor, archive and delete extras in controlled batches, then enforce the rule with a unique index.
Read note →Cybersecurity
Create an incident evidence bundle
Before touching configuration, we will turn the symptom into a precise question and collect a baseline that can be compared after the work.Our specific objective is create an incident evidence bundle. Preser…
Read note →Tech News
Multi-select fields enter public preview in GitHub Projects
Published 2026-07-23. This is a sourced Emmanuel Corels field briefing, written for builders who need the operational meaning behind the headline.What was actually announcedGitHub placed multi-select fields …
Read note →Cloud & DevOps
Keep secrets out of CI logs
When this problem appears in production, urgency encourages guessing. The procedure below deliberately slows the first minute down so the next thirty are useful.Our specific objective is keep secrets out of …
Read note →Networking & ISP Systems
Audit active DNS resolvers
Treat this task as a short investigation rather than a magic command. The command matters, but the context around it is what makes the result trustworthy.Our specific objective is audit active dns resolvers.…
Read note →Automation & Scripting
Test automation against fixtures
This procedure is written for real environments where access, uptime and rollback matter as much as the technical fix.Our specific objective is test automation against fixtures. Small deterministic fixtures …
Read note →Containers & Kubernetes
Run a container with fewer privileges
The useful outcome is not a green terminal. It is a clear explanation of what was checked, what the output means and what should happen next.Our specific objective is run a container with fewer privileges. B…
Read note →Linux & Server Operations
Schedule reliable work with systemd timers
When this problem appears in production, urgency encourages guessing. The procedure below deliberately slows the first minute down so the next thirty are useful.Our specific objective is schedule reliable wo…
Read note →Web Infrastructure
Trace an HTTP redirect chain
The fastest safe route here begins with narrowing the question. We will collect evidence first and change nothing until the output points somewhere specific.Our specific objective is trace an http redirect c…
Read note →Product Engineering
Protect main with required checks
The fastest safe route here begins with narrowing the question. We will collect evidence first and change nothing until the output points somewhere specific.Our specific objective is protect main with requir…
Read note →Databases & Reliability
Choose MySQL DATETIME or TIMESTAMP with time zone and range in mind
Model whether a value is an instant or a civil time, account for session conversion and the 2038 range, use fractional precision deliberately, and test DST boundaries.
Read note →Page 5 of 12 · 134 posts