To check the status of OEM, as the oracle user run:
$ acm statusoem
If OEM is running, messages similar to the following will be displayed:
$ acm statusoem
Oracle Enterprise Manager Express is currently running and is listening
on port 1158, URL: https://<server-hostname>:1158/em/login
If OEM is not running, the following message will be displayed:
$ acm statusoem
Oracle Enterprise Manager Express is not running
To start OEM, as the oracle user run:
$ acm startoem
If OEM starts, messages similar to the following will be displayed:
$ acm statusoem
Oracle Enterprise Manager Express has successfully started and is listening
on port 1158, URL: https://<server-hostname>:1158/em/login
If OEM fails to start, check that port 1158 is open:
Firewall config: Check /etc/sysconfig/iptables
Port listening: Check with netstat -ltn
$ acm stopoem
The following message will be displayed:
$ acm stopoem
Oracle Enterprise Manager Express has stopped
https://<server-hostname>:1158/em/login