unix
9 minLinux Disk Full Errors: Blocks, Inodes, Deleted Files, and Safe Cleanup
Diagnose ENOSPC when disk usage looks confusing, including exhausted inodes and deleted files still held open.
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Q&A
Q&AWhy can a Linux filesystem be full when du shows free space?
Inodes may be exhausted, or deleted files may still be held open by running processes.
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Compare df -h with df -i. If block usage and directory totals disagree, inspect open-but-deleted files with lsof +L1. A process retains allocated blocks until it closes the file; restart or signal the owning service through its safe lifecycle after confirming the file is disposable.
devops
8 minProduction Observability: Signals, Service Objectives, and Useful Alerts
Build an operational view around user-visible latency, traffic, errors, and saturation instead of dashboards full of disconnected metrics.
unix
8 minpipefail, Signals, and Unix Process Management
Unix is full of tiny control primitives. Learn how `set -o pipefail`, process signals, and clean lifecycle management keep shell pipelines reliable and debuggable.
devops
10 minDocker Multi-Stage Builds: Optimization Patterns for Production
Multi-stage builds keep the runtime image lean while preserving a fast developer loop. Learn how to separate build dependencies from runtime dependencies without losing traceability or reproducibility.