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<title>Eric&#039;s Blog - Shell 中sed 的操作 的评论</title>
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<description>删除file.txt的1~3行sed -i &#039;1,3d&#039; file.txt -i 选项用于直接修改原文件。删除file.txt第4行及之后的所有行sed -i &#039;4,$d&#039; file.txt4....</description>
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