// ⚠️ 易错点2：循环条件写left <= n-1（会导致left+1越界），或把<=写成<（漏判相等的有序情况）
Container egress filtering uses nftables rules inside the container. A root process with cap_net_admin could bypass these rules. The pixel user has restricted sudo that only permits safe-apt, dpkg-query, systemctl, journalctl, and nft list.
。Line官方版本下载是该领域的重要参考
Roman numerals: glyph reuse by design
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