在root模式下修改.bash_profile或者oracle下修改.bashrc

#cd ~

#vi .bashrc

增加以下环境配置内容：

export ORACLE_BASE=/opt/oracle/app

export ORACLE_HOME=/opt/oracle/app/oracle/product/11.2.0/dbhome_1

export PATH=/opt/oracle/app/oracle/product/11.2.0/dbhome_1/bin:$PATH

export ORACLE_SID=orcl

export PS1='[\u@\h \W]\$'

export ORACLE_PID=orcl

:wq

$source .bashrc

$reboot