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I have a list of several thousand gzip (*.gz) files that I'd like to zgrep through, but I only want to run it on files with a last-modified-timestamp on or after yesterday (11/22/2012) and that contain the string "widget" in their filnames (filtering by these reduces the number of files to about 80).

I don't see any timestamp or file pattern arguments that I can add to my zgrep command - any ideas?

For example:

eijdij8484.gz modified last on 11/20/2012 <== dont zgrep
dj8j4848ju-widget-dj8d4dj48d.gz modified last on 11/20/2012 <== dont zgrep bc of timestamp
ijdijdijdjii.gz modified last on 11/23/2012 <== dont zgrep bc no "widget" in filename
3ijdidj4-widget-jd9idj48.gz modified last on 11/22/2012 <== zgrep!

Thanks in advance!

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up vote 1 down vote accepted

Something like this might get you going the right direction.

#!/bin/bash
    cutoff="20121122"
    for i in `find . -type f -name "*widget*.gz"; do
        modDate="`stat -c %y $i | awk '{print $1}' | sed 's/-//g'`"
        if [ ${modDate} < ${cutoff} ]; then
            command here on $i
        fi
    done

This was a quick write-up because my wife is waiting on me to get out of the house, so try that for a bit and I will try to test it out more in-depth later this evening.

Edit - Is this meant to be a floating "yesterday" relative to the current day? Or is it a hard "11/22/12"?

share|improve this answer
    
Floating yesterday, but dont sweat it - i can tweak it from here, thanks!! – pnongrata Nov 24 '12 at 0:13
    
Awesome, hope it gets you where you want to be! – nerdwaller Nov 24 '12 at 1:53
    
If you want it: date --date='1 day ago' +%Y%m%d does it. – nerdwaller Nov 24 '12 at 2:18

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