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Hi. I have installed Zabbix 2.2.6 on CentOS 6.5. Question not too relative to CentOS, but hope somebody can help with it. All triggers works correctly, but venti:system.users.num.last(0)}>0 - dont't. Screenshot one: http://i.stack.imgur.com/YM9mu.png And second one: http://i.stack.imgur.com/TMNqx.png From manual https://www.zabbix.com/documentation/1.8/manual/config/items?s[]=system&s[]=users&s[]=num we see, that: > Command who is used on agent side. who on box side: 14:29:44 [root at venti /tmp] # who setevoy pts/0...