RAC Attack - Oracle Cluster Database at Home/RAC Attack 12c/Linux Post Installation No Internet

  To connect to the new created virtual machine, create a connection in Putty for the new VM called collabn1 with the IP Address of 192.168.78.51. 


 * Optionally, create another connection for collabn2 with the IP Address of 192.168.78.52 that will be created later as a clone of collabn1.



 Open the collabn1 connection by clicking Open. 
 * Click Yes on the Security Alert dialog box.



 Enter root at the login as: prompt and racattack at the password: prompt. 



 Turn off and disable the firewall IPTables. 

[root@collabn1 ~]# service iptables stop iptables: Flushing firewall rules:                        [  OK  ] iptables: Setting chains to policy ACCEPT: filter         [  OK  ] iptables: Unloading modules:                              [  OK  ]

[root@collabn1 ~]# chkconfig iptables off

[root@collabn1 ~]# chkconfig --list iptables iptables       0:off   1:off   2:off   3:off   4:off   5:off   6:off

 Disable SELinux. Open the config file and change the SELINUX variable from enforcing to disabled. 

[root@collabn1 ~]# vim /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: #    enforcing - SELinux security policy is enforced. #    permissive - SELinux prints warnings instead of enforcing. #    disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of these two values: #    targeted - Targeted processes are protected, #    mls - Multi Level Security protection. SELINUXTYPE=targeted

 Verify that all the network interfaces are up. 

[root@collabn1 ~]# ip l 1: lo:  mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0:  mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:4f:8a:0b brd ff:ff:ff:ff:ff:ff 3: eth1:  mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:99:7e:95 brd ff:ff:ff:ff:ff:ff 4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:e2:63:7f brd ff:ff:ff:ff:ff:ff

<li style="margin-top:3em"> Add the DVD as repository. </li>

Go to the VBOX menu => Storage => Add the DVD device to the server Device -> CD/DVD Devices -> Oracle_Linux_6_4.iso

Run the following commands:

mkdir /media/cdrom mount /dev/cdrom /media/cdrom/ cd /etc/yum.repos.d mkdir /tmp/old.yum.repos.d mv * /tmp/old.yum.repos.d cat <<EOF > ol64.repo [OL64] name=Oracle Linux 6.4 x86_64 baseurl=file:///media//cdrom gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY gpgcheck=1 enabled=1 EOF

<li style="margin-top:3em"> Install the database preinstall package oracle-rdbms-server-11gR2-preinstall. </li> This package installs all the package requirements for Oracle 11g (but will work also for 12c), configures kernel parameters, creates oracle user and groups and sets the user limits.

[root@collabn1 ~]# yum install -y oracle-rdbms-server-11gR2-preinstall .... Transaction Summary ======================================================================== Install     21 Package(s) Upgrade      2 Package(s) Total download size: 43 M .... Installed: oracle-rdbms-server-11gR2-preinstall.x86_64 0:1.0-8.el6 .... Complete!

<li style="margin-top:3em"> Install additional RPMs that will be used to install and administer the servers. </li>

[root@collabn1 ~]# rpm -ivh /media/cdrom/Packages/kernel-uek-devel-$(uname -r).rpm

[root@collabn1 ~]# yum install -y tigervnc-server.x86_64 xclock man parted.x86_64 unzip.x86_64 xterm lsof bind xorg-x11-twm oracleasm-support Install     12 Package(s) .... Total download size: 22 M .... Complete!

<li style="margin-top:3em"> Uninstall NTP. </li>

[root@collabn1 ~]# yum remove -y ntp .... Removed: ntp.x86_64 0:4.2.4p8-3.el6 .... Complete!

[root@collabn1 ~]# <li style="margin-top:3em"> Unmount the DVD before continuing with the next steps. </li> [root@collabn1 ~]# umount /media/cdrom </ol>