/usr/sbin/groupadd oinstall
/usr/sbin/groupadd dba

/usr/sbin/useradd -g oinstall -G dba oracle
passwd oracle

mkdir /opt/oracle
mkdir /opt/oracle/product
mkdir /opt/oracle/product/10.1.0
chown -R oracle.oinstall /opt/oracle

mkdir /opt/oracle/oradata
chown -R oracle.oinstall /opt/oracle/oradata

mkdir /var/opt/oracle
chown oracle.dba /var/opt/oracle
chmod 755 /var/opt/oracle

vi /etc/sysctl.conf
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000

vi /etc/security/limits.conf
* soft nproc 2047
* hard nproc 16384
* soft nofile 1024
* hard nofile 65536

vi /etc/profile
if [ $USER = "oracle" ]; then
if [ $SHELL = "/bin/ksh" ]; then
ulimit -p 16384
ulimit -n 65536
else
ulimit -u 16384 -n 65536
fi
fi

vi .bach_profile
export ORACLE_BASE=/opt/oracle
export ORACLE_HOME=/opt/oracle/product/10.1.0
export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/Apache/Apache/bin:$PATH
export ORACLE_OWNER=oracle
export ORACLE_SID=URPDB
export ORACLE_TERM=vt100
export LD_ASSUME_KERNEL=2.4.1
export THREADS_FLAG=native
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
export LD_LIBRARY_PATH
export PATH=$PATH:$ORACLE_HOME/bin
export NLS_LANG=AMERICAN_AMERICA.UTF8
export LANG=en_US
export ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data
CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib
CLASSPATH=$CLASSPATH:$ORACLE_HOME/network/jlib
export CLASSPATH

確認並是修改生效
$ source .bash_profile