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: "When activating a module, the semodule command will copy those modules into a dedicated directory."
A block of code is set as follows:
chain input {
type filter hook input priority 0;
ct state new meta secmark set tcp dport map @secmapping_in
ct state new ct secmark set meta secmark
ct state established,related meta secmark set ct secmark
}
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
(roleattributeset cil_gen_require system_r) (block pgpool (type domain) (roletype .system_r domain) )
Any command-line input or output is written as follows:
$ cat /etc/passwd cat: /etc/passwd: Permission denied
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: "This can be accomplished through the Open Policy button, or by navigating to File | Open Policy."
Tips or important notes
Appear like this.