Hello,

I'm very new in Zabbix. I researched on the internet, I found nothing. Therefore, I need your support.

I have Zabbix 3.2.1 Server (It was installed yum package). All Zabbix agents in the current version. I want to control all the linux service. All servers are Linux operating system (Rhel 6.x). When I use the default templates services seems to be closed. I can not control the ntpd, crond, httpd, sshd, ldap, ftp.. other services..

item gives an following error in the host item list.
"Invalid first parameter.""

All Server OS: Rhel 6.x

[root@zabbix-server /]# zabbix_server -V
zabbix_server (Zabbix) 3.2.1
Revision 62890 30 September 2016, compilation time: Oct 3 2016 00:51:42

[root@zabbix-agentsw]# zabbix_agentd -V
zabbix_agentd (daemon) (Zabbix) 3.2.1
Revision 62890 30 September 2016, compilation time: Oct 3 2016 00:54:51

example ssh item and trigger informations;

Item Information

Name: SSH service is running
Type: zabbix agent
Key: net.tcp.service[sshd,,49922]
Type of information: Numeric (unsigned)
Data type: Decimal
Units:
Use custom multiplier: 1
Update interval (in sec): 60
Custom intervals: FlexibleScheduling - 50 - 1-7,00:00-24:00
History storage period (in days):7
Trend storage period (in days): 365
Store value: As is
Show value: Service state
Applications: None- SSH service
Populates host inventory field: None
Status: Enabled

Trigger Information

Saverity: Average
Name: SSH service is down on {HOST.NAME}
Expression: {Template App SSH Service:net.tcp.service[sshd,,49922].max(#3)}=0
Status: Enabled