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how to extarct only size and file names

Posted on 2010-11-09
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Last Modified: 2012-05-10
How to extract only file names and  size from ls -l command
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Question by:damodar4u
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8 Comments
 
LVL 12

Expert Comment

by:tel2
ID: 34096053
Hi damodar4u,

Is this what you're after (size + name):

    ls -l | awk '{print $5" "$9}'

Or swap the fields (name + size):

    ls -l | awk '{print $9" "$5}'
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LVL 12

Assisted Solution

by:tel2
tel2 earned 166 total points
ID: 34096065
Or similarly, using Perl:

ls -l | perl -ane 'print "$F[4] $F[8]\n"'
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LVL 7

Expert Comment

by:compaqus
ID: 34096087
This script will do it:

you can also choose other fields from there, like the date, just add ${date} separated by comma.

Copy that in a file and make it executable. (chmod 744 yourfile.sh)
ls -lh will give the size in "human readable" format
#!/bin/sh

ls -l | while read attr numitems owner group size date time name
do 
    echo ${size},${name} >> output.csv 
done

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Accepted Solution

by:
compaqus earned 167 total points
ID: 34096166
tel2 is also right.

Just count the columns in the ls -l output and change accordingly, same on my solution.

On ubuntu server I have the filename at the 8 column so it would be s -l | awk '{print $8" "$5}'


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LVL 12

Expert Comment

by:tel2
ID: 34096208
Or if you want it to be easier to read, one simple way is to add a tab like this:

    ls -l | awk '{print $5"\t"$9}'
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LVL 48

Assisted Solution

by:Tintin
Tintin earned 167 total points
ID: 34098565
A more portable solution is

ls -l | awk '{print $5,$(NF)}'
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LVL 12

Expert Comment

by:tel2
ID: 34100393
Nice work, Tintin!  That worked out well.

I assume the ()s are not needed, so it could be simplified to:

    ls -l | awk '{print $5,$NF}'
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LVL 48

Expert Comment

by:Tintin
ID: 34100679
Ah, yes.  The () aren't needed.  It's useful for when you want something like the 2nd last field, eg:

awk '{print $(NF-1)}'
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