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question_answer #4272
openanswer_ana
Status:
New
Priority:
Normal
Assignee:
-
Start date:
01/26/2024
Due date:
% Done:
0%
Estimated time:
answer:
- '选项B: sed -i "s/root/ROOT/g" file.txt'
- '选项C: awk ''{gsub(/root/,"ROOT"); print $0 }'' file.txt > file.txt'
answer_analysis:
替换一个文本文件内root关键字为大写的ROOT，不管root关键字出现多少次都替换它并写入原文件，可以使用命令 sed -i "s/root/ROOT/g" file.txt
或者 awk '{gsub(/root/,"ROOT"); print $0 }' file.txt > file.txt
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