Recommended awk tutorials

The Grymoire’s tutorial on AWK

The Grymoire - Tutorial on the AWK program language.

Samples

• awk -f awk-script.awk input-file.txt
• awk 'BEGIN {print "hello"} {print $0} END {print "end"}' input-file.txt
• cat input-file.txt | awk -f awk-script.awk
• awk -v awk_var=$my_bash_var 'length { print awk_var }' input-file.txt. Show $my_bash_var on non-empty lines.
• Followings are same

{if ($0 ~ /special/) {print}}
$0 ~ /special/ {print}
/special/ {print $0}

• Combine multiple conditions

($0 ~ /whole/) || (($1 ~ /part1/) && ($2 ~ /part2/)) {print}