非纯种程序猿 Thinking all about tech & life

经常会遇到需要批量重命名文件的情况，用鼠标太夸张了，简单总结两种比较简单的方法：

问题：

存在大量html文件，需要重命名为htm文件

1.rename

通常重命名的命令是mv，Larry Wall写的rename具有更强大的功能。能够用perl的正则语法结构进行文件重命名。

NAME
       rename - renames multiple files
SYNOPSIS
       rename [ -v ] [ -n ] [ -f ] perlexpr [ files ]
DESCRIPTION
       "rename" renames the filenames supplied according to the rule specified
       as the first argument.  The perlexpr argument is a Perl expression
       which is expected to modify the $_ string in Perl for at least some of
       the filenames specified.  If a given filename is not modified by the
       expression, it will not be renamed.  If no filenames are given on the
       command line, filenames will be read via standard input.
       For example, to rename all files matching "*.bak" to strip the
       extension, you might say
               rename 's//.bak$//' *.bak
       To translate uppercase names to lower, you'd use
               rename 'y/A-Z/a-z/' * 

上面是rename的man手册，针对上面重命名html文件的问题，解决如下：

rename 's/.html$/.htm/' *.html

简单来说就是重命名所有html文件（*.html），将文件名结尾处.html替换为.htm('s/.html$/.htm/')，其实更简单的表达式可以为's/l$//'

2.printf

使用shell命令中的prinf打印出需要的文件名，然后在使用mv重命名

for i in *.html

do

newname="`printf "%s" ${i/html}`"htm

mv $i $newname

done