Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "A subnet such as 255.255.255.0 contains a total of 24 ones, so we can represent this subnet mask by simply writing it as /24. "

A block of code is set as follows:

html, body, #map {
 height: 100%; 
 margin: 0;
 padding: 0
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

[default]
exten => s,1,Dial(Zap/1|30)
exten => s,2,Voicemail(u100)
exten => s,102,Voicemail(b100)
exten => i,1,Voicemail(s0)

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

$ ping 8.8.8.8 -c 4
$ sudo tcpdump -i eth0 -nn -s0 -v port 443 -w /home/kali/Desktop/tcpdump_capture.pcap

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "The VirtualBox import wizard will open. Simply click Import to begin importing the virtual image into VirtualBox."

Tips or important notes

Appear like this.