Shell Programming and Scripting

awk '{print FILENAME, $0}' test*.txt
test1.txt from test1 file
test2.txt from test2 file
test3.txt from test3 file

find . -name "test*.txt.Z" -exec zcat {} \; | awk '{print FILENAME, $0}' 
- from test1 file
- from test2 file
- from test3 file

find . -name "test*.txt.Z" -print | awk '{F=$0; while(("zcat "F| getline) > 0) print F, $0; close("zcat "F)}'

find . -name "test*.txt.Z" -print | while read FILE
do
    zcat "$FILE" | awk -v F="$FILE" '{ print F, $0 }'
done

find . -name "test*.txt.Z" -exec zcat -v {} \; 1>&1 2>&1 | awk ' {
        sub(/[ \t]+[0-9]+\.[0-9]%/,x,$0)
        r = match($0, /\..*:/)
        if(r) {
                f = substr($0,RSTART,RLENGTH-1)
                print "Filename: " f
                $0 = substr($0,RSTART+RLENGTH)
                sub(/^[ \t]+/,x,$0)
        }
        print $0
} '