# Page Not Found

The URL `di-2-zhang-an-zhuang-freebsd/di-2.1-install-pre` does not exist.

You might be looking for one of these pages:
- [25.1 ZFS 概述](https://book.bsdcn.org/di-25-zhang-zfs-wen-jian-xi-tong/di-25.1-jie-zfs-gai-shu.md)
- [2.4 安装故障排除](https://book.bsdcn.org/di-2-zhang-freebsd-an-zhuang-ji-chu/di-2.4-jie-an-zhuang-gu-zhang-pai-chu.md)
- [15.4 ipfirewall（IPFW）](https://book.bsdcn.org/di-15-zhang-fang-huo-qiang/di-15.4-jie-ipfirewall-ipfw.md)
- [4.4 Shell 基础](https://book.bsdcn.org/di-4-zhang-freebsd-ji-chu/di-4.4-jie-shell-ji-chu.md)
- [22.9 Shell 配置](https://book.bsdcn.org/di-22-zhang-freebsd-kai-fa-yu-she-qu-gong-xian/di-22.9-jie-shell-pei-zhi.md)

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