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: "This allows the zabbix user to use sudo and restart the Apache web server."

A block of code is set as follows:

PROBLEM: SNMP trap has arrived on snmptraps on snmptraps 

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

BB +5.0V         | 4.97 Volts        | ok 
Baseboard Temp   | 23 degrees C      | ok 
System Fan 2     | 3267 RPM          | ok 
Power Unit Stat  | 0x00              | ok 

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

$ snmptrap -Ci -v 2c -c public <Zabbix server> "" "NET-SNMP-MIB::netSnmpExperimental" NET-SNMP-MIB::netSnmpExperimental s "Critical Error"

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: "Go to Configuration | Actions and click on SNMP action in the Name column."