In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "The flag -PS forces a TCP SYN ping scan."

A block of code is set as follows:

table.insert(fingerprints, {
  category='cms',
  probes={
    {path='/changelog.txt'},
    {path='/tinymce/changelog.txt'},
  },
  matches={
    {match='Version (.-) ', output='Version \1'},
    {output='Interesting, a changelog.'}
  }
})

Any command-line input or output is written as follows:

$ nmap -sP -PS80,21,53 <target>
$ nmap -sP -PS1-1000 <target>
$ nmap -sP -PS80,100-1000 <target>

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "Click on OK to start downloading your new working copy."