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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 OSF1

rmf

rmf(1)							      General Commands Manual							    rmf(1)

NAME

       rmf - remove folder (only available within the message handling system, mh)

SYNOPSIS

       rmf [+folder] [-help] [-[no]interactive]

OPTIONS

       Prints  a  list of the valid options to this command.  Asks for confirmation before deleting a folder. By default, rmf deletes a folder and
       its messages without asking for confirmation.  If you specify the -interactive option, rmf asks if you are sure before deleting the folder.
       You are advised to use this option, since when rmf deletes a folder its contents are lost irretrievably.

DESCRIPTION

       The  rmf  command  removes all of the messages within the current folder, and then removes the folder itself. If there are any files within
       the folder which are not part of MH, they are not removed, and an error message is displayed.

       You can specify a folder other than the current folder by using the +folder argument. If you do not specify a folder, and rmf  cannot  find
       the current folder,rmf asks you whether you want to delete +inbox instead.

       If the current folder is removed, it makes +inbox current.

       Note that the rmf command irreversibly deletes messages that do not have other links, so use it with caution.

       If  the	folder	being removed is a sub-folder, the parent folder becomes the new current folder, and rmf tells you that this has happened.
       This provides an easy mechanism for selecting a set of messages, operating on the list, then removing the list and returning to the current
       folder from which the list was extracted.

       Using  rmf  to  delete a read-only folder deletes the private sequence and current message information from the file, without affecting the
       folder itself. If you have sub-folders within a folder, you must delete all the sub-folders before you can delete the folder itself.

PROFILE COMPONENTS

       Path: To determine the user's Mail directory

EXAMPLES

       This example shows how rmf asks for confirmation when the -interactive option is used: % rmf -interactive +test Remove folder "test"? y

FILES

       The user profile.

SEE ALSO

       rmm(1)

																	    rmf(1)
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