Some guidelines to upgrade Zabbix

First we will talk about some guidelines to follow when you want to upgrade your Zabbix installation.

Zabbix works with a <major>.<minor>.<patch version> numbering. What does this mean? For example, in Zabbix 2.4.1, we have three numbers—the first number is the major version number. So when Zabbix moved from 1.8 to 2.0, we had a major upgrade. The next number is our minor number. The third number is the patch version. Now when we upgrade Zabbix, it is important to know that when the patch version changes, it means that small fixes or small new features are added to Zabbix. Those features never have impact on the database, so updating binaries from your frontend and server alone should be enough.

However, when Zabbix changes the major or the minor number, new features are introduced that have probably made some changes to the database. In this case, it is important to do a database upgrade first.

Also when you download Zabbix you will...