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Linux Tutorial :: View topic - Command for displaying users with disk usage
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Command for displaying users with disk usage

 
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saran
Newbie


Joined: Apr 30, 2003
Posts: 1
Location: India

PostPosted: Wed Apr 30, 2003 4:03 pm    Post subject: Command for displaying users with disk usage Reply with quote

Dear all, Smile

My task to write a bash shell script which automates the process of finding top ten home directories and/or top-ten mailboxes in terms of disk usage.

Can any one help by giving me the exact command for this or by giving the shell script as per the below requirement.....


To write a bash shell script which automates the process of finding top ten home directories and/or top-ten mailboxes in terms of disk usage. Extract the home directories from the /etc/passwd file, but only consider the directories in /home. The mailboxes are actually files located in the /var/mail directory. The script should accept exactly one input argument as a flag to indicate whether to print the top-ten mailboxes as well. When no argument or more than one is supplied, print out a one-line error message.
The argument could be either “home” or “all”. If you have chosen to invoke the script with “all”, you need to display the top-ten home directories as well as the top-ten mailboxes on the terminal. Make sure exactly one empty line separates between both results. When argument “home” is used, only top-ten home directories are displayed. Display the top ten lists in descending order with the disk usage in kilobytes only to the terminal with suitable column headings. Example:
$ myscript.sh all
User Home Space (KB)
steve 3400
….
 Empty line
User Mail Space (KB)
jdoe 2000
_________________
Thanks and regards,

Saran.
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PostPosted: Sun May 04, 2003 8:25 pm    Post subject: Reply with quote

I seem to be missing what the problem is. In your requirement you specify exactly what the scripts is supposed to do, so I am not sure what you are asking. Getting disk space used is done with the du command:

du -s = gives the sum and is useful for directories
du -k = gives the size in kilobyles

So parse /etc/passwd to get the list of users, user name and their home directories. Do a "du -sk" on their home directory to get the sum and the du -s on their mailbox. The output could be stored in a temp file and then sorted in decreasing order:

homedir_size username

This file could then be parsed to give you the appropriate values and then simply output:

echo "$username $homedir_size"

The same could be done for the mailbox size.

Regards,

jimmo
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