TopicLadder
Storage repair

Linux Disk Space and Logs for Makers

Learn how bytes, inodes, logs, and deleted-open files can each make a project machine look full.

Topic goal to ladder route

Know the destination, then climb the route.

A topic is the maker goal. A ladder is the route from what you understand now to one visible proof you can build, sketch, test, or explain. This one ties back to Deploy a Static Site on a VPS.

Start point

Name what you already understand before the build gets bigger.

Topic goal

Identify whether a disk-full problem is bytes, inodes, journal logs, Docker, or deleted-open files.

Ladder route

Read the short lesson, watch one source tutorial, sketch the idea, check the math, then practice.

Project proof

Write a five-command disk-full triage checklist and explain what each command proves.

Ladder steps

Each step should prove one idea before the project asks for the next one.

1
Check bytesByte pressure means the filesystem has little storage space left. df -h shows Use% and available space.
2
Check inodesInode pressure means too many files exist even if bytes look available. df -i shows IUse%.
3
Check logs and journalsLogs can grow until they dominate a filesystem. journalctl --disk-usage gives the journal size.
4
Check deleted-open filesA deleted file can still consume space until the process closes it. lsof +L1 lists open deleted files.

Examples to inspect

Use examples to read signals, not as blind recipes.

Check filesystem byte usage

Project signal

df -h

Expected signal: Use% and Available columns

Check inode usage

Project signal

df -i

Expected signal: IUse% column

Find deleted-open files

Project signal

sudo lsof +L1

Expected signal: Open files with link count below one

Caution: May expose process paths; inspect before sharing output.

Common traps

  • Deleting random files before proving the owner.
  • Ignoring inode pressure.
  • Deleting journal directories manually.

Practice task

Write a five-command disk-full triage checklist and explain what each command proves.

Next steps

  • Use the LinuxOneLiners disk-full hub.
  • Learn log search.
  • Learn Docker disk usage.

Practice path

  • Near-Copy Rebuild: Recreate one example, decision path, or worked explanation from Linux Disk Space and Logs for Makers. Keep most givens the same, then apply, explain, and check while naming each cue you used. Use the lesson's example block when it helps.
  • One-Change Transfer: Change exactly one condition, number, input, symptom, material, or constraint from the near-copy case. Then apply, explain, and check again and explain what changed.
  • Mixed Review Set: Interleave this topic with one prerequisite or adjacent idea. Write three short prompts: one recall, one application, and one comparison.
  • Find And Fix The Error: Invent a plausible wrong answer, unsafe step, invalid assumption, or bad classification. Mark the first point where it goes wrong, then correct it using the lesson's check.

Flashcard preview

How can df -h look fine while a filesystem is still unusable?

The filesystem can be out of inodes; check df -i.

What does the 'Check bytes' step prove?

Byte pressure means the filesystem has little storage space left. Check: df -h shows Use% and available space.

What does the 'Check inodes' step prove?

Inode pressure means too many files exist even if bytes look available. Check: df -i shows IUse%.

What does the 'Check logs and journals' step prove?

Logs can grow until they dominate a filesystem. Check: journalctl --disk-usage gives the journal size.

What does the 'Check deleted-open files' step prove?

A deleted file can still consume space until the process closes it. Check: lsof +L1 lists open deleted files.

When would you use `df -h`?

Use it to check filesystem byte usage. Expected signal: Use% and Available columns

Downloadable study pack

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Related paths

Study pack check passed. Notes, cards, examples, and practice tasks are meant to keep the lesson useful outside the page.

Connected routes

Use these links like a project map: what helps before this, what this unlocks, and where it fits.

What this unlocks

  • Use the LinuxOneLiners disk-full hub.
  • Learn log search.
  • Learn Docker disk usage.

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Topic: Linux Disk Space and Logs for Makers

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Last reviewed: July 5, 2026. TopicLadder pages are curated for practical learning and may be updated as examples improve.