diff --git a/dsh-server-docs/scripts/bash-output-guard.py b/dsh-server-docs/scripts/bash-output-guard.py
index aadd486..eb2df52 100644
--- a/dsh-server-docs/scripts/bash-output-guard.py
+++ b/dsh-server-docs/scripts/bash-output-guard.py
@@ -57,8 +57,8 @@ RULES = [
      '`ls -R` 递归全树', '改用 `ls -la 目录 | head -20`，或 `ls 目录 | wc -l`'),
     (True, r'\bfind\s+(/[A-Za-z]|[A-Za-z]:)',
      '`find` 从盘符/根起全树扫', '改用 `find 具体目录 -maxdepth 3 … | head -20`'),
-    (True, r'\bjournalctl\b(?!.*(-n\s*\d|head))',
-     '`journalctl` 无行数限制', '改用 `journalctl -u X -n 50 --no-pager`'),
+    (True, r'\bjournalctl\b(?!.*(-n\s*\d|head|--since))',
+     '`journalctl` 无行数/时间限制', '改用 `journalctl -u X -n 50 --no-pager`（`--since` 也算限流，放行）'),
     (True, r'\bdmesg\b(?!.*head)',
      '`dmesg` 无行数限制', '改用 `dmesg | tail -30`'),
     (False, r'(^|[|;&]\s*)rg\b(?!.*\|)',