Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

You are writing a portable Bourne-compatible shell script that must compress any log file in /var/log that exceeds 100 MiB (104 857 600 bytes). The loop must:

  1. Confirm that each entry is a regular file before acting.
  2. Compare the file's size against the byte threshold using POSIX-defined numeric operators.

Which snippet meets both requirements while remaining compatible with a standard /bin/sh on Linux?

  • for f in /var/log/*; do
  test -f "$f" && test $(stat -c%s "$f") > 104857600 && gzip "$f"
done

  • for f in /var/log/*; do
  [ -f "$f" ] && [ $(stat -c%s "$f") -gt 104857600 ] && gzip "$f"
done

  • for f in /var/log/*; do
  [[ -d "$f" ]] && [[ $(du -m "$f" | cut -f1) -gt 100 ]] && gzip "$f"
done

  • for f in /var/log/*; do
  if (( $(stat -c%s "$f") > 104857600 )); then gzip "$f"; fi
done
CompTIA Linux+ XK0-006 (V8)
Automation, Orchestration, and Scripting
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