Conventions used

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

CodeInText: 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: "For Linux, sudo iptables -L lists your current rules in iptables."

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

netstat -antp | grep "LISTEN"

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:

Most of us share our personal information on many web portals by clicking I Agree or I Accept the Terms and Conditions

Warnings or important notes appear like this.

Tips and tricks appear like this.