Explainer
Automate Let's Encrypt renewal with cron
Check existing Certbot renewal automation, test it safely, and reload the web server only after a certificate is renewed.
Explainer
Schedule a cron job for a specific date and time
Read the five cron fields, account for recurring dates and timezone, and choose at for a job that should run only once.
Explainer
Schedule recurring tasks in Windows
Use Task Scheduler or schtasks to run scripts on a schedule, with an explicit interpreter, task account, and working directory.
Explainer
Send Kubernetes application errors to Google Cloud Error Reporting
Use structured container logs or the Error Reporting API, and verify collection, stack-trace formatting, resource type, and workload credentials.
Explainer
Configure Nginx as a caching reverse proxy
Set up a bounded response cache, exclude personalized requests, inspect cache status, and manage expiry without confusing bypass with purge.
Technical guide
View your global Git configuration
List global settings, trace configuration values to their source and scope, and account for includes, worktree settings, and command-level overrides.
Technical guide
Review staged changes before a Git commit
Compare the index with HEAD, distinguish staged and unstaged edits, and inspect exactly what a normal commit will record.
Explainer
Find recent queries in MySQL
Inspect retained Performance Schema statement history or enable a short general-log capture, with correct ordering and logging scope.
Technical guide
Wait without blocking in Node.js
Pause an async function with a timer Promise, cancel a wait with AbortSignal, and avoid blocking the event loop or assuming exact timing.
Technical guide
Choose an SSH private key for Git commands
Select an SSH identity per command, host alias, or repository, and verify the effective configuration without confusing commit identity with authentication.
Technical guide
Squash recent Git commits into one
Use interactive rebase or a soft reset to combine private commits, preserve a backup, and avoid rewriting unrelated shared history.
Technical guide
Stash untracked files in Git
Include new files with stash -u, distinguish ignored files from untracked files, and restore a stash without losing track of conflicts.