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Full Discussion: Bash script for printing folder names and their sizes
Homework and Emergencies Homework & Coursework Questions Bash script for printing folder names and their sizes Post 302867983 by UncleIS on Friday 25th of October 2013 01:00:23 PM
Old 10-25-2013
Bash script for printing folder names and their sizes
1. The problem statement, all variables and given/known data:

The task is to create a script that would reproduce the output of 'du' command, but in a different way: what 'du' does is:
Code:
<size> <folder name>

and what is needed is
Code:
<folder name> <size>

We need to show only 10 folders which are the biggest ones.

2. Relevant commands, code, scripts, algorithms:

Nothing special was stated here, so any solution that can still be called a bash script is good enough to be used.

3. The attempts at a solution (include all code and scripts):

I've tried several variants and finally came up with this:

Code:
du $1 2> /dev/null |\
    
    sort -nr -k1 |\

    head -10 |\

    cut -f2  |\

        while read fname

            do

                printf "${fname}\t`du -h --summarize \"$fname\" 2> /dev/null | cut -f1`\n"

            done

It does the job, but works too slowly to be used on practice: for my '/usr' folder it takes 7 minutes and 30 seconds to complete, while the 'du' with filters ('du /usr | sort -nr -k1 | head -10') does everything for 2 minutes and 30 seconds.

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):

Linux System Administration course, ITExpert educational centre, Minsk, Belarus.

Teacher: Viktor Kobzarev.

Thank you for your help!
 

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LEARN ABOUT OSX

locale::script

Locale::Script(3pm)					 Perl Programmers Reference Guide				       Locale::Script(3pm)

NAME

       Locale::Script - standard codes for script identification

SYNOPSIS

	  use Locale::Script;

	  $script  = code2script('phnx');		      # 'Phoenician'
	  $code    = script2code('Phoenician'); 	      # 'Phnx'
	  $code    = script2code('Phoenician',
				 LOCALE_CODE_NUMERIC);	      # 115

	  @codes   = all_script_codes();
	  @scripts = all_script_names();

DESCRIPTION

       The "Locale::Script" module provides access to standards codes used for identifying scripts, such as those defined in ISO 15924.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 15924
       four-letter codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying scripts. 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:

	  $script = code2script('phnx','alpha');
	  $script = code2script('phnx',LOCALE_SCRIPT_ALPHA);

       The codesets currently supported are:

       alpha, LOCALE_SCRIPT_ALPHA
	   This is a set of four-letter (capitalized) codes from ISO 15924 such as 'Phnx' for Phoenician.  It also includes additions to this set
	   included in the IANA language registry.

	   The Zxxx, Zyyy, and Zzzz codes are not used.

	   This is the default code set.

       num, LOCALE_SCRIPT_NUMERIC
	   This is a set of three-digit numeric codes from ISO 15924 such as 115 for Phoenician.

ROUTINES

       code2script ( CODE [,CODESET] )
       script2code ( NAME [,CODESET] )
       script_code2code ( CODE ,CODESET ,CODESET2 )
       all_script_codes ( [CODESET] )
       all_script_names ( [CODESET] )
       Locale::Script::rename_script  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Script::add_script  ( CODE ,NAME [,CODESET] )
       Locale::Script::delete_script  ( CODE [,CODESET] )
       Locale::Script::add_script_alias  ( NAME ,NEW_NAME )
       Locale::Script::delete_script_alias  ( NAME )
       Locale::Script::rename_script_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Script::add_script_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Script::delete_script_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.unicode.org/iso15924/
	   Home page for ISO 15924.

       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) 1997-2001 Canon Research Centre Europe (CRE).
	  Copyright (c) 2001-2010 Neil Bowers
	  Copyright (c) 2010-2012 Sullivan Beck

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

perl v5.16.2							    2012-10-11						       Locale::Script(3pm)
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