Enterprise Manager Console ERROR: NMO not setuid-root (Unix-only)

we making below steps

[oracle@linux1 ~]$ su
Password:
[root@linux1 oracle]# cd $ORACLE_HOME
[root@linux1 db_1]# chmod 6750 bin/nm?
[root@linux1 db_1]# chmod 700 bin/emdctl
[root@linux1 db_1]# chmod 700 bin/emagent
[root@linux1 db_1]# chown root bin/nm?

[root@linux1 db_1]# exit

[oracle@linux1 ~]$ emctl stop dbconsole

[oracle@linux1 ~]$ emctl start dbconsole