Category Archives: Step by step installation guides

Oracle Enterprise Manager Cloud Control 12c Release 2 Installation on Oracle Linux 5.5

    First of all, we must have already installed oracle Linux 5.5, which may download from

and olready installed oracle software – and created database.

Let start install Enterprise Manager Cloud Control 12c, download software :

If you have performed a default database installation you will need to deconfigure Enterprise Manager-Database Control. Run the following command as the “oracle” user.

emca -deconfig dbcontrol db -repos drop -SYS_PWD <sys pasword> -SYSMAN_PWD <sysman password>

sqlplus / AS SYSDBA
ALTER SYSTEM SET session_cached_cursors=200 SCOPE=SPFILE;
ALTER SYSTEM SET shared_pool_size=600M SCOPE=SPFILE;
ALTER SYSTEM SET pga_aggregate_target=1G SCOPE=SPFILE;
ALTER SYSTEM SET job_queue_processes=20 SCOPE=SPFILE;

make directories for software and agent:

mkdir -p /u01/app/oracle/oms12c
mkdir -p /u01/app/oracle/agent12c

Unzip the Cloud Control media and run “runInstller”.

If you wish to receive support information, enter the required details, or uncheck the security updates checkbox and click the “Next” button. Click the “Yes”.


If you wish to check for updates, enter the required details, or check the “Skip” option and click the “Next” button.


If you have performed the prerequisites as described, the installation should pass all prerequisite checks. Click the “Next” button.


Select the “Create a new Enterprise Manager System” and “Simple” options, then click the “Next”.


enter midleware and agent locations.


Enter the administrator password and database details, then click Next.


click the “Yes” button to disable the stats gathering job.


if you agree the information, click the “Install”.

after complete installation run the suggested script as root, after that click OK.


Details on necessary URLs are available in the “/u01/app/oracle/Middleware/oms/install/setupinfo.txt” file.

In our case it is https://ol6:4901/em and we see login screen.


To startup Enterprise Manager 12c Cloud Control and Agent use this:

$OMS_HOME/bin/emctl start oms
$AGENT_HOME/bin/emctl start agent

To shutdown:

$OMS_HOME/bin/emctl stop oms -all
$AGENT_HOME/bin/emctl stop agent

that’s all. 🙂

install oracle linux 5.5 x64 on vmware 6

to download oracle enterprise linux 5.5 click link :

for downloading this you must have oracle account, it’s standard registration form.

now we have OS (operating system) file let start:

  1.  run vmware, file->new->virtual machine
  2. click next
  3. browse OS  .iso file and click next
  4. choose corresponding options and click next: 
  5.  choose virtual machine name and location for virtual machine files :
  6. specify disk capacity :
  7. click next and finish. now we have virtual machine for oracle linux and now install OS
  8. press enter :
  9. then choose skip and enter
  10. click next, choose language choose, choose keyboard and click YES;
  11. then click next YES;
  12. set hostname and click edit,  set ip address and netmask :
  13. choose region and click next
  14. enter password for root
  15. select customize now and click next
  16. choose this packages:                                                                                                    Desktop Environments                                                                                             GNOME Desktop Environment                                                                          Applications Graphical InternetDevelopment

    Development Libraries

    Development Tools

    GNOME Software Development

    Java Development

    Legacy Software Development

    X Software Development  (Select libxpdevel and openmotif)


    Server Configuration Tools

    Web Server

    Windows File Server

    Base System

    Administration Tools



    Legacy Software Support (select compat-db)

    System Tools  (select sysstat , oracleasm-2.6.18-194.el5-2.0.5-1.el5.x86_64, oracleasm-support-2.1.3-1.el5.x86_64)

    X Window System

17. click next;

18. at last in this installation disable selinux and firewall.

that’s all, Good luck.  😉