Error - Connection to host as user oracle failed: ERROR: NMO not setuid-root (Unix-only)

Error in Oracle Enterprise Manager:

Error - Connection to host as user oracle failed: ERROR: NMO not setuid-root (Unix-only)

Solution:

Re-implementation of the $ORACLE_HOME/root.sh, the problem is resolved.

Step 1: Login as oracle user and Stop Enterprise manager control using emctl start dbconsole

Step 2: Login as root and execute $ORACLE_HOME/root.sh

Ste3 : Login as oracle user and Start Enterprise Manager Control using emctl stop dbconsole