Using a loop with cut Post: 302476134

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Top Forums Shell Programming and Scripting Using a loop with cut Post 302476134 by ninjafish on Wednesday 1st of December 2010 01:04:55 AM

12-01-2010

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ok so du -skh /home/* works better than what I was using, but the part of it i'm not understanding is how to implement it into a loop. The two lines I posted were to copy the user names for the system into a text file. Now I need to figure out how to use a loop to go through that text file, cutting out each user name, and displaying the storage use for each user.

If it helps, I can copy and paste the question I am trying to do. I printed a bunch of tutorial things offline to try to learn from.

Code:

Take the following scenario when you are the system administrator to purchase a larger disk drive for your Linux server. You receive a phone call from an angry user, who claims that they are unable to save the files. To solve this problem quickly, you must check which user had taken most of the disk space and then make a decision what to do.  

Display the Device name, used space for each disk in kilo bytes and also the total available disk space in GB with meaningful headings sorted by Capacity. 

Display the usage in kilo bytes sorted in descending order (highest as the first line) for the first 10 users. (Test in Ubantu only as opentech does not allow you to access the other users. Create 3 or 4 users in Ubantu and 4 to 5 files in each user’s directory). 

Ask the user to enter the size of the used space in Kilobytes. List all users whose used space is  more than the size entered by the user as:
Login Name    User Full name		Used space

Login Name is the directory name itself. User Full name can be obtained from /etc/passwd command.

I'v spent a couple days on this already, and it's making me wannna go crazy

Last edited by ninjafish; 12-01-2010 at 12:44 PM..

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listusers

listusers(1)						      General Commands Manual						      listusers(1)

NAME

       listusers - display user login data

SYNOPSIS

       groups] logins]

DESCRIPTION

       The  command  displays  data  concerning user logins.  The output shows the user login and the comment field value (for example, user name,
       location).  The default displays data about all user logins.

   Options
       The command supports the following options:

	      Display only users who have
			     groups, as their primary group. Use with the option.

	      Display only users who have
			     groups, as their supplementary group.  Use with the option.

	      Display all users belonging to
			     groups, sorted by login.  A comma separated list specifies multiple groups.

	      Display the requested
			     logins.  A comma separated list specifies multiple logins.

	      Display only users belonging to the specified repository,
			     either for NIS or users.

       A user login has a UID of 100 or greater.

       When the and options are combined, a user login is only displayed once, even though the login may belong to multiple specified groups.

EXAMPLES

       List all user logins.

       List all user logins in the group and the users removing all duplicates.

       List all users who have as their primary group.

       List all users who have as their supplementary group.

       List only local user logins.

       List only NIS user logins.

FILES

SEE ALSO

       passwd(1), logins(1M), group(4), passwd(4).

STANDARDS CONFORMANCE

																      listusers(1)