不是***的，但应该可以:

Not the greatest, but this should work:

sed -i 'Ns/.*/replacement-line/' file.txt

其中 N 应替换为您的目标行号.这将替换原始文件中的行.要将更改的文本保存在不同的文件中，请删除 -i 选项:

where N should be replaced by your target line number. This replaces the line in the original file. To save the changed text in a different file, drop the -i option:

sed 'Ns/.*/replacement-line/' file.txt > new_file.txt