Dear all,
Sorry to disturb you.
I have install Phenix to my computer Centos 7.0. 
When I want to use it I need to 
cd /usr/local/phenix-1.9-1692/ 
and 
 . /usr/local/phenix-1.9-1692/phenix_env.sh 
then type phenix in the command line every time. 
I wish to use phenix in every terminate window and just type phenix.
Some told me use export PATH to do it but I don't know how to do it.
I am new to linux(centos)
Thank you so much!
Best,
Weifei