After several hours of trying to determine why when I ran ./emctl start oms absolute nothing happened. I wasn’t even receiving an error message. I set JAVA_HOME, OMS_HOME, ORACLE_HOME and yet nothing. I checked ./emctl start agent and that worked without any issue, but not the emctl under the OMS home. I was perplexed. And then I saw metalink note How to Recreate the emctl Script for the Enterprise Manager OMS (Doc ID 1404623.1). My file was indeed 0 bytes. The note describes how to recreate the file. I’ve since made a backup of the emctl for future reference. Hopefully when I google “emctl start oms returns no information” this post will serve as a reminder.