https://eblog.ink/archives/157/ zh-CN 删除file.txt的1~3行sed -i '1,3d' 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 '4,$d' file.txt4.... Thu, 01 Jan 1970 00:00:00 +0000 Thu, 01 Jan 1970 00:00:00 +0000