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Full Discussion: renaming files, please help
Top Forums Shell Programming and Scripting renaming files, please help Post 302258290 by methyl on Friday 14th of November 2008 08:44:42 AM
Old 11-14-2008
Ignoring the %M appearing twice, we assume you meant %Y%M%D .Your main problem is the parameters to "date". They are case significant. date +%D displays a date mm/dd/yy complete with solidus characters which is not good in a filename! date +%d displays just the day number (01-31). Also date +%M is minutes not the month number!
Code:
date +%Y%M%D 
20082011/14/08

date +%Y%m%d
20081114

To avoid generating a shell command which is too long, when working with long lists of filenames they should be presented as a list not as multiple arguments on the same line. There are many ways of doing this. Here is one. Test with echo statements before moving files around. It is all too easy to generate duplicate filenames.

Code:
#!/bin/ksh
YYYYMMDD="`date +%Y%m%d`"
ls -1 *\.csv|while read OLD_NAME
do
    echo "Old filename: ${OLD_NAME}"
    PREFIX="`echo ${OLD_NAME}|cut -f1 -d-`"
    NEW_NAME="/abc/data/${PREFIX}_${YYYYMMDD}.csv"
    echo "New filename: ${NEW_NAME}"
    # if [ ! -f "${NEW_NAME}" ]
    # then
    #      mv "${OLD_NAME}" "${NEW_NAME}"
    # else
    #      echo "New filename already exists: ${NEW_NAME}"
    # fi
done

 

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LEARN ABOUT CENTOS

locale::codes::langext

Locale::Codes::LangExt(3)				User Contributed Perl Documentation				 Locale::Codes::LangExt(3)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-02-27						 Locale::Codes::LangExt(3)
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