renames multiple files

rename [ -h|-m|-V ] [ -v ] [ -n ] [ -f ] [ -e|-E perlexpr]*|perlexpr [ files ]

Renames the filenames according to perlexpr 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.

Example, to rename all files matching "*.bak" to strip the extension:

> rename 's/\e.bak$//' *.bak
To translate uppercase names to lower, use:
> rename 'y/A-Z/a-z/' *
-e Expression: code to act on files name. May be repeated to build up code (like "perl -e"). If no -e, the first argument is used as code.
-E Statement: code to act on files name, as -e but terminated by ';'.
Verbose: print names of files successfully renamed.
No action: output files to be renamed
Over write: allow existing files to be over-written.
Help: print SYNOPSIS and OPTIONS.
Manual: print manual page.
Version: show version number.