Conventions

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

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "On the Zabbix server-side, you need to carefully set the value of StartTrappers=."

A block of code is set as follows:

#First of all we need to import csv and Networkx
import csv
import networkx as nx
#Then we need to define who is our zabbix server and some other detail to properly produce the DOT file
zabbix_service_ipaddr = "192.168.1.100"
main_loop_ipaddr = "10.12.20.1"

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

# we can open our CSV file
csv_reader = csv.DictReader( open( 'my_export.csv' ), \
 delimiter=",", \
 fieldnames=( "ipaddress", "hostname", "oid", "dontcare", "neighbors" ))
# Skip the header
csv_reader.next()

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

# chkconfig --level 345 zabbix-server on

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "There is a clear warning on the website that warns us with this statement: The Appliance is not intended for serious production use at this time."