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: "The Principal parameter (*) used within the resource-based policies is used to identify the user, account, or role."

A block of code is set as follows:

       { 
           "Sid": "Stmt1604259864802", 
           "Action": "s3:*", 
           "Effect": "Deny", 
           "Resource": "arn:aws:s3:::myexamplebucket/*", 

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

           "Condition": { 
               "NotIpAddress": { 
                   "aws:SourceIp": "192.168.1.10/24" 
               } 
           }, 
           "Principal": "*" 
       }

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

$ cd AWS-for-System-Administrators/Chapter4/html

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "If you are creating a new user, click on Add user."

Tips or important notes

Appear like this.