This option will be used when your OEM agent binaries on the target host was dropped and you cannot remove it from your Enterprise Manager monitoring using the Graphical Interface. Download Full Free Installation Manual PDF Book from here:
[oracle@HOST]$ cd /u00/oms12.0.3/oms/bin
[oracle@HOST]$ ./emcli login -username=SYSMAN
Enter password:xxxxxxx
Login successful
[oracle@HOST]$ ./emcli sync
Synchronized successfully
[oracle@HOST]$ ./emcli delete_target -name="name.domain:3872" -type="oracle_emd" -delete_monitored_targets
Target "name.domain:3872:oracle_emd" deleted successfully