一、配置oracle使用者下的環境變數

# .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

TMP=/tmp; export TMP
TMPDIR=$TMP; export TMPDIR
ORACLE_BASE=/data/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1; export ORACLE_HOME
ORACLE_SID=orcl; export ORACLE_SID
ORACLE_TERM=xterm; export ORACLE_TERM
PATH=$ORACLE_HOME/bin:/usr/sbin:$PATH:$ORACLE_HOME/inventory/Scripts/ext/lib; export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib:$ORACLE_HOME/inventory/Scripts/ext/lib:/lib:/usr/lib; export LD_LIBRARY_PATH
CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib:$oracle_HOME/inventory/Scripts/ext/lib; export CLASSPATH

umask 022

二、/etc/hosts檔案設定

127.0.0.1 oracle.shichang localhost localhost.localdomain localhost4 localhost4.localdomain4

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

注意上面紅色的部分，這是主機名，一定要新增進去。不然netca的時候通不過

三、CentOs防火牆/etc/sysconfig/iptables配置，開啟一個1521埠，讓客戶機可以連到Oracle

# 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 -m state --state NEW -m tcp -p tcp --dport 1521 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

四、強制安裝libaio包(否則無法dbca)

rpm -ivh --force libaio-0.3.105-2.i386.rpm

rpm -ivh --force libaio-devel-0.3.105-2.i386.rpm

五、如果還不能用dbca，要安裝p8670579包