Agent can't start in CentOS 7

[nmz]

When I start to zabbix agent I got this error :

zabbix-agent.service - Zabbix Agent
   Loaded: loaded (/usr/lib/systemd/system/zabbix-agent.service; enabled)
   Active: failed (Result: start-limit) since Mon 2016-02-29 13:43:40 MMT; 14s ago
  Process: 7914 ExecStart=/usr/sbin/zabbix_agentd -c $CONFFILE (code=exited, status=0/SUCCESS)
 Main PID: 5230 (code=exited, status=1/FAILURE)

How can i fix it? When I search in /usr/sbin there 2 zabbix agent file. zabbix_agent and zabbix_agentd

There's no pid file according to my agent conf file. According to my conf file pid file path is /var/run/zabbix

[Firm]

Show the output of journalctl -n. Can you stry to start zabbix_agent manually? Like /usr/bin/zabbix_agent.

[nmz]

There's is no zabbix-agent in /usr/bin and I didn't see any zabbix agent related log when I run journalctl -n. Thanks for your reply and waiting more replys

[Firm]

/usr/sbin/zabbix_agentd -c <your_config_file> (or /usr/sbin/zabbix_agent if exists).

[nmz]

That's result of journalctl -n

central-db systemd[1]: Failed to start Zabbix Agent.
central-db systemd[1]: Unit zabbix-agent.service entered failed state.
central-db systemd[1]: zabbix-agent.service holdoff time over, scheduling restart.
central-db systemd[1]: Stopping Zabbix Agent...
central-db systemd[1]: Starting Zabbix Agent...
central-db systemd[1]: zabbix-agent.service start request repeated too quickly, refusing to start.
central-db systemd[1]: Failed to start Zabbix Agent.

[Firm]

Try to start manually as I wrote earlier.

[Balaraju]

I have same with zabbix agent with centos 6.5

i have done what you given command as -c

it's working for first time if we start again its not restarting again failed with 13 permission denied. i have disabled selinux and firewall too.