I have a simple function that greps within a folder into files that are already gunzipped. This was already written for me so from my understanding fn=$1 specifies that it will look into any file in that folder that is gunzipped and the rest of the script greps the data its looking for and puts it into a new file with '_woodsmoke'.

Code:

#!/bin/bash
fn=$1
fn2=${fn}_woodsmoke
echo "processing file $fn"
grep "  47225" $fn > $fn2
grep "  82115" $fn >> $fn2
grep "  82123" $fn >> $fn2
grep "  82131" $fn >> $fn2
grep 61060202300000 $fn >> $fn2
grep 61060002300000 $fn >> $fn2

The problem is now I need to write something that greps across three different folders within a directory (part1_3b, part2_eb, part3_scsdmd). These 3 folders represent data in CA divided by 3 sections. The files in these folders ...although containing different data..have the same name which is why they aren't combined into 1 folder.

For every month of the year and 3 days of the week I have files written as such:

Code:

medsarea.201001sat.v008a.asc.gz
medsarea.201001sun.v008a.asc.gz
medsarea.201001wdy.v008a.asc.gz
.....
medsarea.201002sat.v008a.asc.gz
....

I need it to look across all 3 folders, gunzip & grep data for matching months and days of the week to produce one file per month per day of the week (36 files total) into preferentially a new sub-directory with medsarea.201001sat.v008a.asc_woodsmoke as an example of a Saturday in the first month...but I also need to make sure the original files get zipped back up at the end.

Any tips/pointers/ideas on how to go about this? I am new to shell scripting.

Thanks!