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I tried your first example of grep and it runs much slower than the 2nd example, I have no idea why. Anyway, I just reverted back to the 2nd one.

All it working fine now -- thanks!

I just chose the 2nd one because it looks cleaner, I can switch to the first but it really doesn't matter, I'm not dealing with speed issues at this point. They are both great for my purposes.

The...

Awesome. I used your second example so this works as desired:#!/bin/awk -f

BEGIN{
#
# LookBack should be something like "1 hour" or "1 day" and is set on the command line with
# -v...

I didn't realize that you responded, thanks! ...for whatever reason I didn't get the email.

I did something very similar to you because as you surmised it was slow with the shell calls. So, I did...

Fair enough. I think I have learned enough to get exactly what I want now. This seems to set the variables exactly as they should be. Let me know if you see anything wrong.

Test output included...

I see what you mean by the piping and being a bash script. I actually played with that a bit but didn't get any better results.

Unfortunately I can't get you a better representation of the file...

Hi Don,

Thanks for the reply.

Basically what I am doing is looking through an apache rewrite.log file and filtering out lines I don't want. I use awk to pre-filtering the lines by date so that...

I have a one liner awk script and I would like to move it to a file. When I do I can't get it to work.

This is the original one liner:
awk -v RefDate="$(date -d'now-2 second' '+%s')" -v...