花开的地方 » tr http://www.bsdmap.com 花开，没有声音…… Sat, 04 Feb 2012 21:18:36 +0000 zh-CN hourly 1 http://wordpress.org/?v=3.4-alpha-19814 大小写转换 http://www.bsdmap.com/2010/02/07/tr/ http://www.bsdmap.com/2010/02/07/tr/#comments Sun, 07 Feb 2010 05:17:29 +0000 洪川 http://www.bsdmap.com/?p=1831 将文件file.txt的小写字母转换成大写

1. 使用tr
cat file.txt | tr a-z A-Z
2. 使用sed
sed ‘y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/’ file.txt

sed的 y/source/dest/   Transliterate  the  characters  in  the  pattern space which appear in source to the corresponding character in dest.

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