2. check and configure your system for the installation requirements, like SWAP size, memory...
3. the installation:
# a. install rpm, if you met error here, check step 2. rpm -ivh xxxxxx.rpm # b. configure the Oracle XE: sudo /etc/init.d/oracle-xe configure # press enter if you want to use [default] value #Specify the HTTP port that will be used for Oracle Application Express [8080]: #Specify a port that will be used for the database listener [1521]: #Specify a password to be used for database accounts. Note that the same password will be used for SYS and SYSTEM: #Do you want Oracle Database 11g Express Edition to be started on boot (y/n) [y]: # c. change user 'oracle' 's password: sudo passwd oracle # d. configure Oracle variables: sudo vim /etc/environment # add the following lines (without '#' at the beginning): #ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe #TNS_ADMIN=$ORACLE_HOME/network/admin #ORACLE_SID=XE source /etc/environment # add variables to your profile like .profile or .bashrc (without '#') #export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib #export PATH=$PATH:$ORACLE_HOME/bin # e. test sqlplus, the <password> is set in step 4 sqlplus sys@XE as sysdba # f. change user 'system's password alter user system identified by <password>; # g. simple use 'system' to login sqlplus system/<password>@XE