Find files by extension.
Search a directory tree for regular files with a particular extension and print their paths.
find documents -type f -name '*.txt' | sortExpected output EXAMPLE
documents/notes.txt documents/sub/todo.txt
Details
Run in Bash on GNU/Linux. Uses the standard tools supplied with Ubuntu; no elevated permissions are required.
Quote the pattern so your shell does not expand it before find runs. Paths with line breaks need a null-delimited workflow instead.
Tested on Ubuntu 24.04.5 LTS · · GNU bash, version 5.2.21(1)-release (x86_64-pc-linux-gnu) · bash 5.2.21-2ubuntu4; coreutils 9.4-3ubuntu6.3; findutils 4.9.0-5build1
Test inputs, results and environment
The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.
- Architecture / host kernel
- x86_64 / 6.18.54.1-microsoft-standard-WSL2
- Snippet identity / locale
- uid=65534, gid=65534 (unprivileged) / C.UTF-8
- Interpreter invocation
bash -euo pipefail -c <published code>- Container image ID
sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd- Code SHA-256
b26cbc6566ce831e6c51c7b28fffc42c5b8cdb6c93cf0651028e557b798a7592- Dependencies
- bash 5.2.21-2ubuntu4; coreutils 9.4-3ubuntu6.3; findutils 4.9.0-5build1
Test input setup
These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.
mkdir -p documents/sub; touch documents/notes.txt documents/sub/todo.txt documents/image.png
Observed standard output
documents/notes.txt documents/sub/todo.txt
Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.