[ORIGINAL CREATION] learning awk

最新推荐文章于 2025-11-08 19:13:38 发布

原创最新推荐文章于 2025-11-08 19:13:38 发布 · 568 阅读

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#string #delete #bash

本文介绍了如何利用awk工具执行多种文本处理任务，包括文件重命名、字符串替换、记录分割等高级操作。通过具体示例展示了awk的强大功能，如批量重命名匹配特定模式的文件、替换字符串中的字符以及提取文件中指定格式的数据。

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yes | head -20 | awk '{printf("HI%02d", NR)}'

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Delete array[expr] cases array[expr] not to exist.

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echo abc | mawk { gsub(//, "X") ; print }
XaXbXcX
'Cos if FS="""" (Empty) the awk breaks the record into individual characters.mawk recognizes the empty regular expression, //, which matches the empty string and hence is matched by any string at the front, back and between every character.

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ls JUNK* | awk '{ print "mv "$0 " ~/tmp/"$0".tmp" }' | bash
mv all files match "JUNK*" to ~/tmp and append '.tmp' to their names.

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gawk 'BEGIN{RS = "]" ; FS = "["}//[/{print $NF}' testfile

get all section names between [ and ]