Question 1

What's the difference between GNU find and BSD/macOS find?

Accepted Answer

GNU findutils (Linux) supports -printf for custom output formatting, -regextype for choosing regex engines (emacs, posix-awk, posix-egrep), -delete with implicit depth-first ordering, and -execdir. BSD/macOS find lacks -printf (you pipe to stat or use ls -la), uses posix-basic or posix-extended regex via -E, and has stricter -delete semantics that require the directory to be empty. This builder has a GNU/BSD toggle that switches unavailable features and shows variant-specific notes.

Question 2

What's the difference between -exec cmd {} \; and -exec cmd {} + ?

Accepted Answer

\; runs the command once PER matching file (cmd file1; cmd file2; ...). + batches matching files into as few invocations as possible (cmd file1 file2 file3 ...) — much faster, but {} must be the LAST argument before +. The builder picks the right terminator based on your choice and explains the difference. For destructive commands like rm, + can be risky because one bad path passes everything to rm at once.

Question 3

Why is -delete dangerous and how does the builder help?

Accepted Answer

find -delete silently removes files matching your predicates. Common mistakes: forgetting -name so EVERYTHING under the path gets deleted, or putting -delete before -name so find evaluates -delete on every entry before filtering. The builder (1) always places predicates BEFORE actions in the generated command, (2) shows a red destructive badge whenever -delete or -exec rm is selected, (3) recommends a -print preview first, and (4) suggests -print0 | xargs -0 rm as the safer xargs pattern for filenames with spaces.

Question 4

How does -mtime n work? What about +n and -n?

Accepted Answer

find -mtime n matches files modified EXACTLY n*24h ago (fractional days round down, so -mtime 1 means between 24h and 48h ago). -mtime +n means MORE than n*24h ago (older). -mtime -n means LESS than n*24h ago (newer). For finer granularity use -mmin (minutes). For relative comparison use -newer file (modified after file) or -newermt '2024-01-01' (GNU only, after a date). The builder explains the boundary semantics with each option.

Question 5

What extra features does this tool have?

Accepted Answer

(1) Visual predicate composer: name/iname, type (f/d/l/b/c/p), size (+/-N with k/M/G units), time (mtime/mmin, +n/n/-n, -newer), depth (maxdepth/mindepth), perm (octal/symbolic), user/group, empty, paths. (2) Boolean AND/OR/NOT with properly-escaped  groups. (3) Action: print (default), -exec cmd {} \; / {} +, xargs (-print0 | xargs -0), -delete (guarded). (4) GNU vs BSD variant toggle with feature-availability notes. (5) Per-option plain-English explanation. (6) Plain-English command summary. (7) Dangerous-action warnings. (8) -print0/xargs -0 safe-filename pattern. (9) Recipe library (12 common one-liners). (10) Shell-quoting of arguments. (11) Copy command + download. (12) Validation with errors + warnings. (13) localStorage history (max 20). (14) Shareable URL with embedded config. 100% client-side — nothing is executed or uploaded.

find Command Builder

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