</>SnippetSearch. A little code. A lot of possibility.

List running processes.

Display process IDs, parent process IDs, and command names for all visible processes.

Bash terminal 
ps -eo pid,ppid,comm

Expected output EXAMPLE · VARIES BY SYSTEM

    PID    PPID COMMAND
… running processes …

Details

Run in Bash on GNU/Linux. Uses the standard tools supplied with Ubuntu; no elevated permissions are required.

Keep in mind

A container only sees processes in its process namespace. This command does not stop or modify them.

✓ Verified

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; procps 2:4.0.4-4ubuntu3.3

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
597101aefe2dad1da60582020961de57121a1ee5fbed354b7287a9bb1ceba3f0
Dependencies
bash 5.2.21-2ubuntu4; procps 2:4.0.4-4ubuntu3.3

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.

# No input files required.

Observed standard output

    PID    PPID COMMAND
      1       0 python3
    121       1 ps

Exit code: 0. Standard error: empty. Validation: Shape/content assertions. System-dependent values above are one recorded run.

Additional assertions that passed

Checks recorded by the test harness. Where Python assertions are shown, browser cases use Playwright and simulator cases may inspect pin transitions: result.stdout is captured output, work is the temporary directory, and Path is pathlib.Path. The harness also imports json and csv.

assert 'PID' in result.stdout and 'PPID' in result.stdout and 'ps' in result.stdout
# process # ps # pid