type builtin tips — authorized shell-type 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

type helps authorized labs sample command-kind classification in shells they own. Pair with which-command-tips, realpath-resolve-tips, and env-vars-tips.

On this page

Snapshot

FieldValue
Surfacetype tip checklist
JobAuthorized shell-type literacy
which peerwhich-command-tips
realpath peerrealpath-resolve-tips
env peerenv-vars-tips

Tip checklist (authorized only)

  1. Confirm you may inspect the shell on the host (lab VM / your sample / courseware).
  2. Prefer type ls / type -a python3 / type -t cd short queries over dumping all functions.
  3. Record flags (-a / -t) and name you actually typed.
  4. Quote short Evidence; never paste secret-bearing function bodies.
  5. If you need PATH file location only, cross-check which-command-tips.
  6. Optional: canonicalize file path → realpath-resolve-tips; split → dirname-basename-tips.
  7. Optional: env context → env-vars-tips; keep a copy → tee-pipe-tips.
  8. Redact hostnames and sensitive labels before sharing.

Allowed framing

  • Classroom labs distinguishing alias vs builtin vs file on a syllabus VM.
  • Binding type / -a / -t settings as Evidence.
  • Documenting "not found / shell differs" as valid lab outcomes.
  • Comparing type ↔ which under one binder.

Scope we will not cover

  • No crack/pirate/keygen via type.
  • No alias-hijack / unauthorized-access / bypass PoCs.
  • No credential-theft via dumping secret-bearing shell functions.
  • No intentional mass type enumeration against hosts you do not own.

Beginner path (authorized only)

  1. Obtain one syllabus-approved lab VM you control.
  2. Run type -a ls and type -t cd; quote both.
  3. Bind notes as Evidence; redact sensitive labels.
  4. Optional: compare with which-command-tips.
  5. Stop at literacy — no hijack cookbooks.
Which to pick
  • Prefer authorized, short, redacted Evidence.
  • Use which / realpath / env peers when the syllabus asks.
  • No exploit, crack, or unauthorized-access framing.

For legal, authorized and educational use only.

FAQ

What is a "type builtin tip" page in BinBench framing?

A checklist for classifying authorized shell commands (alias/function/builtin/file) on hosts you own — not a cookbook for probing other users\' private shells.

How does this relate to which-command-tips?

which-command-tips covers PATH file lookup. This page zooms on shell type Evidence — it does not overwrite that page.

Can I type-probe other users\' interactive shells I do not administer?

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

Does this teach exploit / alias-hijack PoCs?

No. Mentions of exploit appear only as refusals. Authorized type literacy only.

Does this teach credential theft via function dumps?

No. Redact function bodies that may embed secrets before sharing.

Sources