You must first resize the file system (using resize2fs or similar tools) and then shrink the logical volume to match the new size.

首先您必须调整文件系统大小(使用resize2fs或者类似工具)，然后缩小逻辑卷来匹配新的大小。

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Assessment tools are the guard for the information security on the risk assessment, and then we can establish the information security management system.

风险评估必须用到评估工具来完成对信息保护的工作，从而建立信息安全的管理体系。

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This thesis reviews the state of art in Internet congestion control research, and then analyses the nonlinear dynamics of Internet congestion control system based on simulation tools.

本文在归纳、总结了关于互联网拥塞控制的研究现状的基础上，利用仿真工具，分析了互联网拥塞控制系统的动力学行为。

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