Nice intro. Awk is a useful tool when you want to do simple line-by-line processing. Note: The article says that awk patterns can't capture groups. The standar

Nice intro. Awk is a useful tool when you want to do simple line-by-line processing. Note: The article says that awk patterns can't capture groups. The standard doesn't provide that functionality, but if you use the widely-available gawk implementation, gawk does have that capability (use "match").