[solute:]
http://blog.csdn.net/caolaosanahnu/article/details/7327752
If you not declare oracle_home evn path in .bash_file, set evn via vim/vi:
cd vi .bash_profile :wq source .bash_profile
If you had declared oracle_home evn path in .bash_file,you just need source it to env:
cd source .bash_profile
explain:forgot to install Chinese input in centOS,since do some addition in English.