Bash & Scripting · easy · solved in-browser (no VM needed) · 3 tiered hints
Write /home/player/strict.sh, a script that opens with the unofficial Bash strict-mode header. The first line must be the shebang #!/usr/bin/env bash. Then enable strict mode with `set -euo pipefail`, and set IFS to a safe value (a newline and tab) with an `IFS=` assignment (e.g. IFS=$' \t'). (Authored config, graded structurally — the engine isn't run here.)
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Open the challenge and an in-page editor appears — write your answer and tmpfs.tech grades it server-side against the same checks a real box would run. No VM, no install, no signup needed to try.
Write robust shell: loops, parsing, exit codes and small automation.
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Is it free? Yes — play as a guest, no signup required to start.
Do I need to install anything? No. Everything runs in your browser.
How is it graded? Automatically and deterministically — your work is checked against the exact rules the live box would apply.