Oracle Database 11gR2 Installation Requirements: 60GB of Hard disk 4GB of RAM 2 CPU Create Group and User: [root@anar]# groupadd -g 1000 oinstall [root@anar]# useradd -u 1100 -g oinstall oracle [root@anar]# passwd oracle Changing password for user oracle. New UNIX password: BAD PASSWORD: it is based on a dictionary word Retype new UNIX password: passwd: all authentication tokens updated successfully. Create the directories in which the Oracle software will be installed: [root@anar]# mkdir -p /u01/app/oracle/product/11.2.0/dbhome_1 [root@anar]# chown -R oracle:oinstall /u01 [root@anar]# chmod -R 775 /u01 [root@anar u01]# su – oracle [oracle@anar]$ cd /u01/database/ Before running ./runInstaller open a new terminal and run xhost + as a root user: [root@anar u01]# xhost + access control disabled, clients can connect from any host Start Installation with runInstaller: