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Old 08-16-2011, 11:58 AM   #1
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Shell Command Newbie

I have a problem to solve, and I'm stuck. I must write a Shell Command Script; I have did a little while in college, but I do not remember all to get me over the bumps that I'm facing... Or problems to the few lines that I have did with the script.

Here is the assignment:

Write a shell command that can find all files within the /www/sites/ directory tree that were modified more than 10 days ago, excluding any files with .jpg, .gif, .mov, and .avi extensions. Make the output list the path and size of said file(s).

So far... I have

#! /bin/bash # Not sure if it should be "bash" or "sh" at this point?

find /www/sites/ .-typr f -mtime +10 /xargs tar -cvf 'date' +%d%m%Y' _archive.tar' #I'm thinking that the "_archive.tar'" may not be right for assignment

#stuck here

$ tar --exclude= '.jpg' --exclude= '.gif' --exclude= '.mov' --exclude= '.avi'

#not sure for the rest and how to put it together right now! I do think that I need a echo command to output the information for the sites, path, size. Please help me to understand what I missing by refreshing.

Thank you, Thesnow. I'm still having trouble putting it together. Can you help line by line? I know #! /bin/bash is correct. The second line should be the assignment of a value or variable if that is remember correction. Example FILENAME= "/www/sites/". But, I not sure with search on how to use the for loop with find. I believe a nested construction, but the set up is kill me. Would some give a sample script for the above assignment, I just need to see something that I can follow and read to understand the set up.


- linux

Last edited by Newbie - linux; 08-16-2011 at 04:44 PM. Reason: Need more help because it has been a long time, and I'm not in college to get through.
Old 08-16-2011, 12:45 PM   #2
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If I understand what you're asking, you want a list like

/www/sites/file1 1234
/www/sites/file2 5678
/www/sites/file3 9012

If that's the case, you can do it in one line using a for loop with find (similar to what you have) and egrep (to filter the file extensions) then echo the result (to output the file name) along with the file size using stat. There are certainly other ways to do it too.

Since you said it's an assignment, I will stop short of providing the solution.
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Old 08-16-2011, 01:15 PM   #3
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I always use /bin/bash as the shell in shell scripts.

I can't imagine why tar would be a something to use in the solution.

I advise that you play with the find command a bit until you get something that outputs a list of the files in the relevant directory. Then look at removing the files you're not interested in and then as the other poster said, look at a for loop to iterate the list that's left. You'll find looking at pipes useful.

$ echo "monkey" | grep "monkey"
$ echo "monkey " | grep -v "monkey"
The vertical line is the pipe, it lets you send the output of one command in to another command.

When you post scripts/code it is a good idea to wrap it in CODE tags (look for the # button in the post editor). It makes your post a lot easier to read.

Last edited by arizonagroovejet; 08-16-2011 at 01:16 PM. Reason: s/you're interested in/in the relevant directory/
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Old 08-16-2011, 09:30 PM   #4
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This is a great manual:

It's available in other formats too; it's the third one down from the top.
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Old 08-16-2011, 10:57 PM   #5
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Very helpful Frankbell, reading through it now. Thanks for the direction.

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Old 08-17-2011, 12:51 AM   #6
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As and addon to all that has been said, I would add that find can actually do all that you require on its own.
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Old 08-17-2011, 07:04 PM   #7
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For bash manuals see also - a good tutorial on Linux at the cli level - html version of pdf in post #4

Incidentally, please add new posts; if you edit your orig one its very confusing

#! /bin/bash
should be
ie no spaces in that cmd ...
This is also true for variable assignments, no spaces around the '=' operator

Last edited by chrism01; 08-17-2011 at 07:06 PM.


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