How to identifiy whether or not Oracle Configuration Manager is in use

Change directory to $ORACLE_HOME

# cd $ORACLE_HOME
# ls ccr
bin  config  doc  hosts  inventory  lib  README.pdf  state

If the directory ccr exist, OCM has been installed.

Change directory to ccr/bin:

# cd ccr/bin
# ls -la
drwxr-xr-x 2 oracle dba  4096 Feb 29 16:11 .
drwxr-xr-x 9 oracle dba  4096 Feb 29 16:11 ..
-rwx------ 1 oracle dba 19169 Feb 29 16:11 common
-rw------- 1 oracle dba 47285 Feb 29 16:11 deployPackages
-rwx------ 1 oracle dba  9063 Feb 29 16:11 emocmrsp
-rwx------ 1 oracle dba  5881 Feb 29 16:11 emSnapshotEnv
-rwx------ 1 oracle dba  6116 Feb 29 16:11 lockfile
-rwxr----- 1 oracle dba  1630 Feb 29 16:11 ocmJarUtil
-rw-r--r-- 1 oracle dba  3539 Feb 29 16:11 OCMJarUtil.class
-rwx------ 1 oracle dba 58374 Feb 29 16:11 setupCCR
-rw-r--r-- 1 oracle dba   903 Feb 29 16:11 strip_path.awk

If the file emCCR exists, OCM has been configured.

If not, like in my case above, OCM is installed but not configured for this server.