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question_answer #4282
openanswer_ana
Status:
New
Priority:
Normal
Assignee:
-
Start date:
01/26/2024
Due date:
% Done:
0%
Estimated time:
answer:
- '选项A: sed -e ''4 a newline'' test.txt'
answer_analysis:
sed 命令常用参数：a 在后面新增， i 在前面新增一行，c取代，d删除
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