set -u
ls -la /opt/dshs/scripts/overlay-probe.cjs 2>/dev/null
echo "=== 用法（头部注释）==="
sed -n '1,40p' /opt/dshs/scripts/overlay-probe.cjs | grep -nE "用法|usage|node |--" | head -12
echo "=== 参数表位置 ==="
ls -la /opt/dshs/*参数表* /opt/dshs/docs/*参数表* 2>/dev/null | head -5
find / -maxdepth 4 -name "参数表_覆盖网络_*.md" 2>/dev/null | head -5