awk分隔符設定為多個字符或字符串

awk -F"[01]" '{}'  這種形式指定的分隔符是或的關系，即0或1作為分隔符；
awk -F"[0][1]" '{}' 這種形式指定的分隔符是合並的關系，即以“01”作為一個字符為分隔符。

 

故假如有test.txt文本文件只有一行:

1. mail from: [e-mail]  2. subject:hello  3. data:2012-07-12 17:00  4. content:Hello, The world.  5.   6. mail from: [e-mail]  7. subject:congregation  8. data:2012-07-12 08:31  9. content:Congregation to you.  10.   11. mail from: [e-mail]  12. subject:Test  13. data:2012-07-12 10:20  14. content:This is a test mail.

 

用命令：awk  'BEGIN {FS="[0-9]+[.]";OFS="\n"}{for(i=1;i<=NF;i++) printf("%d  %s\n",i,$i)}' test.txt即可輸出如下格式的形式的文件：

1  
2   mail from: [e-mail]  
3   subject:hello  
4   data:2012-07-12 17:00  
5   content:Hello, The world.  
6     
7   mail from: [e-mail]  
8   subject:congregation  
9   data:2012-07-12 08:31  
10   content:Congregation to you.  
11     
12   mail from: [e-mail]  
13   subject:Test  
14   data:2012-07-12 10:20  
15   content:This is a test mail.