示例文件 /tmp/file

This is line one
This is line two
This is line three
This is line four

示例 1

在匹配行前插入多行内容

解决方案

# sed '/This is line two/iyour text 1\nyour text 2\nyour text 3' /tmp/file
This is line one
your text 1
your text 2
your text 3
This is line two
This is line three
This is line four

示例 2

在匹配行后一行添加我们的内容

解决方案

# sed '/This is line two/ayour text 1\nyour text 2\nyour text 3' /tmp/file
This is line one
This is line two
your text 1
your text 2
your text 3
This is line three
This is line four

sed替换时如何直接修改文件

这可以使用带有 sed 命令的“-i”标志来完成，如下所示。

# sed -i '/This is line two/ayour text 1\nyour text 2\nyour text 3' /tmp/file

建议使用“i.bak”，在替换之前备份目标文件

# sed -i.bak '/This is line two/ayour text 1nyour text 2nyour text 3' /tmp/file