How to set system environments permanently for a user

I finally got Oracle 11g installed on Oracle Linux Server, it was no easy task. I had to edit so many kernel or system settings files.

To run Oracle, I had to set $ORACLE_UNQNAME to orcl each time I login to the Linux. And the command to start up the dbconsole, aarghh, it was a pain to type out - /u01/app/oracle/product/11.2.0/dbhome_1/bin/emctl start dbconsole
I'm yet to forget it.

Well, I decided to fix this once and for all. And all I did was to edit the ~/.bash_profile, added the following lines -
export ORACLE_UNQNAME=orcl
export PATH=$PATH:/u01/app/oracle/product/11.2.0/dbhome_1/bin

So now I no longer need to set the ORACLE_UNQNAME=orcl anymore as it is been done for me. And the long path to emctl command has been added permanently to the system PATH. All I now do is type
emctl start dbconsole
and voila, I'm done.