jueves, 12 de abril de 2012

Instalando Oracle en centos


Proceso Instalación Base de Datos Oracle Entorno Beta
la forma facil es seguir esta guia que está enla documentacion de oracle DB:

http://www.oracle.com/technetwork/articles/servers-storage-admin/ginnydbinstallonlinux-488779.html

 por si acaso el enlace no está disponible en el futuro copio la informacion desde esa fuente, para problemas frecuentes sugiero revisar las rutas asignadas a las variables de entorno creadas:

 PATH=$PATH:$HOME/bin

 export ORACLE_BASE=/home/oracle/app/oracle
export ORACLE_HOME=/home/oracle/app/oracle/product/11.2.0/dbhome_1
export ORACLE_SID=prod
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib:/usr/lib64
export ORACLE_HOME_LISTNER=$ORACLE_HOME

export PATH=$ORACLE_HOME/bin:$ORACLE_HOME_LISTNER:$PATH

Introducing the oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPM for Oracle Linux

Before installing Oracle Database 12c or 11g on a system, you need to preconfigure the operating environment since the database requires certain software packages, package versions, and tweaks to kernel parameters. (Be sure to review the appropriate Oracle Database installation guide to familiarize yourself with hardware, software, and operating system requirements.)
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Note: This article applies to Oracle Linux 6. A previous article, "How I Simplified Oracle Database Installation on Oracle Linux," covered performing a similar task on versions of Oracle Linux 5.
On Oracle Linux, I discovered that there is a remarkably easy way to address these installation prerequisites: First, depending on your database version, install either the RPM package called oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall. This RPM performs a number of preconfiguration steps, including the following:
  • Automatically downloading and installing any additional software packages and specific package versions needed for installing Oracle Grid Infrastructure and Oracle Database 12 c Release 1 (12.1) or 11g Release 2 (11.2.0.3), with package dependencies resolved via yum or up2date capabilities.
  • Creating the user oracle and the groups oinstall (for OraInventory) and dba (for OSDBA), which are used during database installation. (For security purposes, this user has no password by default and cannot log in remotely. To enable remote login, please set a password using the passwd tool.)
  • Modifying kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, the maximum number of file descriptors, and so on.
  • Setting hard and soft shell resource limits in /etc/security/limits.conf, such as the locked-in memory address space, the number of open files, the number of processes, and core file size.
  • Setting numa=off in the kernel for x86_64 machines.
Note that oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall parses the existing /etc/sysctl.conf and /etc/security/limits.conf files and updates values only as needed for database installation. Any precustomized settings not related to database installation are left as is.
The oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPM packages are accessible through the Oracle Unbreakable Linux Network (ULN, which requires a support contract), from the Oracle Linux distribution media, or from the Oracle public yum repository. Thus, whether or not your system is registered with ULN to access Oracle patches and support, you can use oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall to simplify database installation on Oracle Linux. In addition, the Oracle public yum repository now includes all security and bug errata, ensuring systems are secured and stable with the latest security updates and bug fixes.

Installing the oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall RPM

The remainder of this article steps through the procedure that I used for installing oracle-rdbms-server-11gR2-preinstall on Oracle Linux via the Oracle public yum repository. The same steps outlined in the following section can be used for either version of the preinstall RPM package. I started with a system running Oracle Linux Release 6 Update 4 for x86_64, a 64-bit version of Oracle Linux that I downloaded from the Oracle software delivery cloud (requires registration or login). First, I set up a yum configuration file that pointed to the correct repository, and then I installed the oracle-rdbms-server-11gR2-preinstall RPM from that repository.
Here are the steps for preconfiguring a system for Oracle Database installation using oracle-rdbms-server-11gR2-preinstall. Remember, the steps are the same when using the oracle-rdbms-server-12cR1-preinstall package; you simply need to change the name of the RPM package during the yum installation step.
  1. As an authorized user (for example, root), retrieve the file that configures repository locations:

    # cd /etc/yum.repos.d

# wget http://public-yum.oracle.com/public-yum-ol6.repo
  2. Using a text editor, modify the file, changing the field enabled=0 to enabled=1 to reflect repositories that correspond to the machine's operating system release.

    Here is an excerpt of public-yum-old6.repo with the changed lines in boldface.
    [ol6_latest]

name=Oracle Linux $releasever Latest ($basearch)

baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/latest/$basearch/

gpgkey=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6

gpgcheck=1

enabled=1





[ol6_UEK_latest]

name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)

baseurl=http://public-yum.oracle.com/repo/OracleLinux/OL6/UEK/latest/$basearch/

gpgkey=http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol6

gpgcheck=1

enabled=1

    Because the target system is running Oracle Linux Release 6 Update 4 for x86_64, which installs the Oracle Unbreakable Enterprise Kernel by default, there are two repositories to enable, [ol6_latest] and [ol6_UEK_latest].
  3. Next, install the oracle-rdbms-server-11gR2-preinstall RPM using the yum install command. If you are using Oracle Database 12c, then you would type yum install.

    The output in Listing 1 shows how the installation checks dependencies and then downloads and installs the required packages.
    # yum install oracle-rdbms-server-11gR2-preinstall

Loaded plugins: refresh-packagekit, rhnplugin, security

Setting up Install Process

Resolving Dependencies

--> Running transaction check

---> Package oracle-rdbms-server-11gR2-preinstall.x86_64 0:1.0-6.el6 will be installed

--> Processing Dependency: gcc-c++ for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: gcc for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: libaio-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: libstdc++-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: glibc-devel for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: compat-libstdc++-33 for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: ksh for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Processing Dependency: compat-libcap1 for package: oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64

--> Running transaction check

---> Package compat-libcap1.x86_64 0:1.10-1 will be installed

---> Package compat-libstdc++-33.x86_64 0:3.2.3-69.el6 will be installed

---> Package gcc.x86_64 0:4.4.6-4.el6 will be installed

--> Processing Dependency: cpp = 4.4.6-4.el6 for package: gcc-4.4.6-4.el6.x86_64

--> Processing Dependency: cloog-ppl >= 0.15 for package: gcc-4.4.6-4.el6.x86_64

---> Package gcc-c++.x86_64 0:4.4.6-4.el6 will be installed

--> Processing Dependency: libmpfr.so.1()(64bit) for package: gcc-c++-4.4.6-4.el6.x86_64

---> Package glibc-devel.x86_64 0:2.12-1.80.el6_3.4 will be installed

--> Processing Dependency: glibc-headers = 2.12-1.80.el6_3.4 for package: glibc-devel-2.12-1.80.el6_3.4.x86_64

--> Processing Dependency: glibc-headers for package: glibc-devel-2.12-1.80.el6_3.4.x86_64

---> Package ksh.x86_64 0:20100621-16.el6 will be installed

---> Package libaio-devel.x86_64 0:0.3.107-10.el6 will be installed

---> Package libstdc++-devel.x86_64 0:4.4.6-4.el6 will be installed

--> Running transaction check

---> Package cloog-ppl.x86_64 0:0.15.7-1.2.el6 will be installed

--> Processing Dependency: libppl_c.so.2()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64

--> Processing Dependency: libppl.so.7()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64

---> Package cpp.x86_64 0:4.4.6-4.el6 will be installed

---> Package glibc-headers.x86_64 0:2.12-1.80.el6_3.4 will be installed

--> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.12-1.80.el6_3.4.x86_64

--> Processing Dependency: kernel-headers for package: glibc-headers-2.12-1.80.el6_3.4.x86_64

---> Package mpfr.x86_64 0:2.4.1-6.el6 will be installed

--> Running transaction check

---> Package kernel-uek-headers.x86_64 0:2.6.32-300.32.1.el6uek will be installed

---> Package ppl.x86_64 0:0.10.2-11.el6 will be installed

--> Finished Dependency Resolution



Dependencies Resolved



================================================================================

 Package                         Arch   Version                Repository  Size

================================================================================

Installing:

 oracle-rdbms-server-11gR2-preinstall

                                 x86_64 1.0-6.el6              ol6_latest  15 k

Installing for dependencies:

 cloog-ppl                       x86_64 0.15.7-1.2.el6         ol6_latest  93 k

 compat-libcap1                  x86_64 1.10-1                 ol6_latest  17 k

 compat-libstdc++-33             x86_64 3.2.3-69.el6           ol6_latest 183 k

 cpp                             x86_64 4.4.6-4.el6            ol6_latest 3.7 M

 gcc                             x86_64 4.4.6-4.el6            ol6_latest  10 M

 gcc-c++                         x86_64 4.4.6-4.el6            ol6_latest 4.7 M

 glibc-devel                     x86_64 2.12-1.80.el6_3.4      ol6_latest 970 k

 glibc-headers                   x86_64 2.12-1.80.el6_3.4      ol6_latest 600 k

 kernel-uek-headers              x86_64 2.6.32-300.32.1.el6uek ol6_latest 713 k

 ksh                             x86_64 20100621-16.el6        ol6_latest 684 k

 libaio-devel                    x86_64 0.3.107-10.el6         ol6_latest  13 k

 libstdc++-devel                 x86_64 4.4.6-4.el6            ol6_latest 1.5 M

 mpfr                            x86_64 2.4.1-6.el6            ol6_latest 156 k

 ppl                             x86_64 0.10.2-11.el6          ol6_latest 1.3 M



Transaction Summary

================================================================================

Install      15 Package(s)



Total download size: 25 M

Installed size: 61 M

Is this ok [y/N]: Downloading Packages:

--------------------------------------------------------------------------------

Total                                           710 kB/s |  25 MB     00:35     

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction



  Installing : mpfr-2.4.1-6.el6.x86_64                                     1/15 

  Installing : libstdc++-devel-4.4.6-4.el6.x86_64                          2/15 

  Installing : cpp-4.4.6-4.el6.x86_64                                      3/15 

  Installing : ppl-0.10.2-11.el6.x86_64                                    4/15 

  Installing : cloog-ppl-0.15.7-1.2.el6.x86_64                             5/15 

  Installing : kernel-uek-headers-2.6.32-300.32.1.el6uek.x86_64            6/15 

  Installing : glibc-headers-2.12-1.80.el6_3.4.x86_64                      7/15 

  Installing : glibc-devel-2.12-1.80.el6_3.4.x86_64                        8/15 

  Installing : gcc-4.4.6-4.el6.x86_64                                      9/15 

  Installing : gcc-c++-4.4.6-4.el6.x86_64                                 10/15 

  Installing : compat-libstdc++-33-3.2.3-69.el6.x86_64                    11/15 

  Installing : libaio-devel-0.3.107-10.el6.x86_64                         12/15 

  Installing : ksh-20100621-16.el6.x86_64                                 13/15 

  Installing : compat-libcap1-1.10-1.x86_64                               14/15 



  Installing : oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64      15/15 

  Verifying  : gcc-4.4.6-4.el6.x86_64                                      1/15

  Verifying  : compat-libcap1-1.10-1.x86_64                                2/15 

  Verifying  : ksh-20100621-16.el6.x86_64                                  3/15 

  Verifying  : glibc-devel-2.12-1.80.el6_3.4.x86_64                        4/15 

  Verifying  : libaio-devel-0.3.107-10.el6.x86_64                          5/15 

  Verifying  : oracle-rdbms-server-11gR2-preinstall-1.0-6.el6.x86_64       6/15 

  Verifying  : gcc-c++-4.4.6-4.el6.x86_64                                  7/15 

  Verifying  : glibc-headers-2.12-1.80.el6_3.4.x86_64                      8/15 

  Verifying  : libstdc++-devel-4.4.6-4.el6.x86_64                          9/15 

  Verifying  : compat-libstdc++-33-3.2.3-69.el6.x86_64                    10/15 

  Verifying  : mpfr-2.4.1-6.el6.x86_64                                    11/15 

  Verifying  : kernel-uek-headers-2.6.32-300.32.1.el6uek.x86_64           12/15 

  Verifying  : cpp-4.4.6-4.el6.x86_64                                     13/15 

  Verifying  : ppl-0.10.2-11.el6.x86_64                                   14/15 

  Verifying  : cloog-ppl-0.15.7-1.2.el6.x86_64                            15/15 



Installed:

  oracle-rdbms-server-11gR2-preinstall.x86_64 0:1.0-6.el6                       



Dependency Installed:

  cloog-ppl.x86_64 0:0.15.7-1.2.el6                                             

  compat-libcap1.x86_64 0:1.10-1                                                

  compat-libstdc++-33.x86_64 0:3.2.3-69.el6                                     

  cpp.x86_64 0:4.4.6-4.el6                                                      

  gcc.x86_64 0:4.4.6-4.el6                                                      

  gcc-c++.x86_64 0:4.4.6-4.el6                                                  

  glibc-devel.x86_64 0:2.12-1.80.el6_3.4                                        

  glibc-headers.x86_64 0:2.12-1.80.el6_3.4                                      

  kernel-uek-headers.x86_64 0:2.6.32-300.32.1.el6uek                            

  ksh.x86_64 0:20100621-16.el6                                                  

  libaio-devel.x86_64 0:0.3.107-10.el6                                          

  libstdc++-devel.x86_64 0:4.4.6-4.el6                                          

  mpfr.x86_64 0:2.4.1-6.el6                                                     

  ppl.x86_64 0:0.10.2-11.el6                                                    



Complete!
    Listing 1: Installing the oracle-rdbms-server-11gR2-preinstall RPM
    The yum installation logs messages about kernel changes in the file /var/log/oracle-rdbms-server-11gR2-preinstall/results/orakernel.log, and it makes backups of current system settings in the directory /var/log/oracle-rdbms-server-11gR2-preinstall/backup.
  4. At this point, the system is ready for the installation of Oracle Database. For example, to install Oracle Database 11g Release 2, follow the directions in Chapter 4, "Installing Oracle Database," of the Database Installation Guide for Linux."

    Here are the steps I followed while installing Oracle Database 11g Release 2 in my test environment. Make sure you review all documentation and follow recommended best practices before installing into your production environment.
    1. As root, create a parent directory in a file system that has sufficient space to be the target location for the downloaded files:

      # mkdir /home/OraDB11g

# cd /home/OraDB11g

      The amount of disk space needed in the file system varies according to the specific installation type, but roughly twice the size of the zip archives, or 5 GB, is enough to house the software and data files.
    2. Into this target directory, download the installation media files from the Oracle Database Software Downloads page on Oracle Technology Network.
    3. Extract the files: 

      # unzip linux.x64_11gR2_database_1of2.zip

# unzip linux.x64_11gR2_database_2of2.zip
    4. Log in as the user oracle. Change directory to the database directory and enter the following command to run the Oracle Universal Installer:

      $ cd /home/OraDB11g/database

$ ./runInstaller
    The Oracle Universal Installer performs a number of checks, verifying that the necessary OS packages and versions are installed. In addition, it checks kernel parameters set by the oracle-rdbms-server-11gR2-preinstall installation. During the kernel settings check, the installer might flag a few settings as "failed," and you should investigate these failures. In some cases, you still might be able to continue with the database installation. If you check kernel settings in /etc/sysctl.conf, you'll see that oracle-rdbms-server-11gR2-preinstall has modified and added the necessary settings to ensure the minimum requirements are met, as defined in section 2.10.1, "Displaying and Changing Kernel Parameter Values," in Chapter 2, "Oracle Database Preinstallation Requirements," of the Oracle Database Installation Guide 11g Release2 (11.2) for Linux. Below is the list of requirements:
    fs.aio-max-nr = 1048576

fs.file-max = 6815744

kernel.shmall = 2097152

kernel.shmmax = 4294967295

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048576

    If necessary, you can (as root) edit the file /etc/sysctl.conf to specify a setting manually, for example:
    # vi /etc/sysctl.conf 

# /sbin/sysctl -p

    The Oracle Universal Installer performs additional checks, such as verifying the glibc version, sufficient disk space, environmental variable and path settings, and sufficient physical memory and swap space. Generally, installing oracle-rdbms-server-11gR2-preinstall takes care of the prerequisites so that you can proceed directly with installing the database.

Final Thoughts

Installing the oracle-rdbms-server-12cR1-preinstall and oracle-rdbms-server-11gR2-preinstall RPMs can save time when installing Oracle Database 12c and 11g on Oracle Linux. These RPMs address most Oracle Database installation prerequisites and greatly simplify the installation process.

See Also

Here are the resources referenced earlier in this document:
And here are some additional resources from the Oracle Database Documentation Library (http://www.oracle.com/pls/db112/homepage). Relevant subsections from the Oracle Database Installation Guide 11g Release 2 (11.2) for Linux (http://download.oracle.com/docs/cd/E11882_01/install.112/e16763/toc.htm) with currently valid URLs are as follows:

Also see the blog entry "Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 has been released": https://blogs.oracle.com/linux/entry/oracle_rdbms_server_11gr2_pre

1.       Prerrequisitos

a.       En Servidor
                                                   i.      Sistema Operativo CentOS 6.2.
                                                 ii.      Window Manager for X (KDE).
                                                iii.      Configuración de la tarjeta de red.
                                               iv.      Copiar instaladores de la base de datos Oracle.
                                                 v.      Configurar acceso remoto SSH.
para el archivo .bash_profile del usuario oracle se recomienda seguir o tomar como base el siguiente:

cat .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

##  Changes by Oracle Database Team, Rackspace
export ORACLE_SID=habitat
RAC=NO
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
export ORACLE_BASE=/u01/app/oracle

## Change below only, if you know what your doing

export EDITOR=vi
PATH=$ORACLE_HOME/bin:$PATH:/usr/local/bin
export LD_LIBRARY_PATH=$ORACLE_HOME/lib
SORACLE_SID=`echo $ORACLE_SID | tr '[:upper:]' '[:lower:]'`

if [ $RAC = 'NO' ] ; then
     SDBNAME=$SORACLE_SID
     ORACLE_UNQNAME=$ORACLE_SID
  else
     SDBNAME=`echo $SORACLE_SID | sed s/.$//`
     ORACLE_UNQNAME=`echo $ORACLE_SID | sed s/.$//`
fi

export ORACLE_UNQNAME
alias cdo='cd $ORACLE_HOME'
alias cdb='cd $ORACLE_BASE'
alias bdump='cd $ORACLE_BASE/diag/rdbms/$SDBNAME/$ORACLE_SID/trace'
alias udump='cd $ORACLE_BASE/diag/rdbms/$SDBNAME/$ORACLE_SID/trace'
alias alert='tail -f -n100 $ORACLE_BASE/diag/rdbms/$SDBNAME/$ORACLE_SID/trace/alert_$ORACLE_SID.log'
## End



b.      En Cliente (Maquina remota desde donde se hará la instalación)
                                                   i.      Instalar la Herramienta “MobaXterm” (http://mobaxterm.mobatek.net/download-home-edition.html) , la cual se utilizara para realizar la conexión SSH.

2.       Configuración VNC

a.       Seguir los pasos 1 - 2 de la siguiente guía : 

http://wiki.centos.org/HowTos/VNC-Server

b.      Habilitar los puertos de VNC en el archivo /etc/sysconfig/iptables :
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5801 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5901 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 6001 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5802 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5902 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 6002 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5800 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5900 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 6000 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 1521 -j ACCEPT

COMMIT

3.       Configuración del Sistema Operativo

a.       Seguir los pasos 1 - 14 de la guía “Instalacion Oracle 11G R2 / Fedora 14 X64”:

 http://nemthys.wordpress.com/2011/08/23/instalacion-oracle-11g-r2-ferora-14-x64/

4.       Instalación de la Base de Datos

a.       Seguir los pasos iniciales para creación de grupos y usuario para instalar Oracle de la guía Instalacion Oracle 11G R2 / Fedora 14 X64:
http://nemthys.wordpress.com/2011/08/23/instalacion-oracle-11g-r2-ferora-14-x64/

b.      Seguir los pasos 13 - 14 de la guía “Step-by-step installing an Oracle-ready CentOS 6.2 Server”:

http://eduardo-lago.blogspot.com/2012/01/step-by-step-installing-oracle-ready.html

c.       Seguir todos los pasos de la guía “How to install Oracle 11g Database Server on CentOS 6.2” :

 http://eduardo-lago.blogspot.com/2012/01/how-to-install-oracle-11g-database.html
NOTA:  Toda la instalación se realizo con el usuario root

5.       Configuración del Listener

a.       Configurar el hostname en archivo /etc/hosts (HOSTNAME = cable)
127.0.0.1   cable localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

b.      Seguir todos los pasos de la guía “Configuring a network listener for Oracle on CentOS 6.2” : 

http://eduardo-lago.blogspot.com/2012/02/configuring-network-listener-for-oracle.html”






NOTAS:

En caso de tener problemas con el listener o la conexión desde una maquina externa bajar las iptables con:
/usr/sbin/service iptables stop
Lo anterior con el objetivo de bajar las reglas (firewall) para probar por que en un buen numero de casos molesta el firewall para realizar la conexión.

O se puede abrir el puerto 1521 en el archivo iptables (/etc/sysconfig/iptables) como root, para esto se debe:

CREAR REGLA DE ACCESO IP PARA ORACLE:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 1521 -j ACCEPT

Guardar y salir

Y por ultimo:
/sbin/service iptables stop
/sbin/service iptables start

Y en caso de no subir el servicio para ser usado por el listener entonces se deben usar los comandos:

Dbca (y crear una nueva base de datos y así normalmente se crean los 2 servicios, la bd debe tener un nombre diferente de la actual)
lsnrctl  stop
lsnrctl  start (y ya con esto se pueden ver ya arriba los servicios)

y se puede intentar conectar a la base de datos por medio de las diferentes SID que se hayan creado para cada BD.



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