jq select tips — authorized select literacy

Last updated: · By the BinBench editorial team · Stars and releases checked via the GitHub API
For legal, authorized and educational use only. Only analyze software you own or have written permission to examine.
Quick answer

jq select() helps authorized labs sample predicate filters on JSON they own. Pair with jq-filter-tips, yq-yaml-tips, and awk-one-liners-tips.

On this page

Snapshot

FieldValue
Surfacejq select tip checklist
JobAuthorized select literacy
filter peerjq-filter-tips
yq peeryq-yaml-tips
awk peerawk-one-liners-tips

Tip checklist (authorized only)

  1. Confirm you may read the JSON on the host (lab VM / your sample / courseware).
  2. Prefer jq '.[] | select(.ok==true)' short pipelines over dumping entire secrets blobs.
  3. Record the select predicate and path you actually used.
  4. Quote a short filtered excerpt; never paste tokens or PII fields.
  5. If you need general jq framing, cross-check jq-filter-tips.
  6. Optional: YAML cousin → yq-yaml-tips; field glue → cut-fields-tips.
  7. Optional: keep a copy → tee-pipe-tips; text patterns → awk-one-liners-tips.
  8. Redact hostnames and sensitive keys before sharing.

Allowed framing

  • Classroom labs filtering records in a JSON dataset you own.
  • Binding select(...) predicates as Evidence.
  • Documenting "jq not installed / parse error / permission denied" as valid lab outcomes.
  • Comparing jq select ↔ yq under one binder.

Scope we will not cover

  • No crack/pirate/keygen via jq.
  • No persistence / unauthorized-access / bypass PoCs via API scraping.
  • No credential-theft via selecting secret-bearing fields for exfil cookbooks.
  • No intentional full-file jq DoS against hosts you do not own.

Beginner path (authorized only)

  1. Obtain one syllabus-approved lab VM you control.
  2. Run jq '.[] | select(.n>1)' sample.json on a file you own; quote a short result.
  3. Bind predicate notes as Evidence; redact sensitive labels.
  4. Optional: compare with jq-filter-tips.
  5. Stop at literacy — no unauthorized-access cookbooks.
Which to pick
  • Prefer authorized, short, redacted Evidence.
  • Use filter / yq / awk peers when the syllabus asks.
  • No exploit, crack, or unauthorized-access framing.

For legal, authorized and educational use only.

FAQ

What is a "jq select tip" page in BinBench framing?

A checklist for filtering authorized JSON with select() on samples you own — not a cookbook for scraping APIs you do not control.

How does this relate to jq-filter-tips?

jq-filter-tips covers general jq Evidence. This page zooms on select() Evidence — it does not overwrite that page.

Can I jq-select other users\' production JSON I do not administer?

No. Authorization first. BinBench will not publish unauthorized-access recipes.

Does this teach exploit / DoS via huge jq jobs?

No. Mentions of exploit/DoS appear only as refusals. Authorized select literacy only.

Does this teach credential theft via JSON secret fields?

No. Redact tokens, keys, and PII before sharing filtered output.

Sources