Saving scan results in a grepable format
Nmap supports different file formats when saving the results of a scan. Depending on your needs, you may choose between the normal, grepable, and XML format. The grepable format was included to help users extract information from logs without having to write a parser, as this format is meant to be read/parsed with standard Unix tools. Although this feature is deprecated, some people still find it useful for doing quick jobs.
In the following recipe, we will show you how to output Nmap scans in grepable mode.
How to do it...
To save the scan results to a file in the grepable format, add the option -oG <filename>,as shown in the following command:
# nmap -F -oG scanme.grep scanme.nmap.org
The output file should appear after the scan is complete:
# cat nmap.grep # Nmap 6.01 scan initiated Thu Jun 28 01:53:03 2012 as: nmap -oG nmap.grep -F scanme.nmap.org Host: 74.207.244.221 (scanme.nmap.org) Status: Up Host: 74.207.244.221 (scanme.nmap.org) Ports...
