How to configure common Environmental Variable In Red Hat Linux?

How to configure common Environmental Variable In Red Hat Linux?

Hi Dunley, 

You can easily configure environmental variable.

Local variable exist only in current shell instance.
Environmental Variable  passed to sub shells.
Local variables can be exported in to environmental variable.

For example:
# export EDITOR=/usr/bin/pico ( Here you replaced the default editor by Pico)

To remove the value of an environmental variable:
# unset EDITOR

Common Environmental Variable:
HOME   path to user’s home directory
LANG   identification of default language
PWD   user current working directory
EDITOR  default edits program for text
LESS   option to pass to the less command

To see the value of a variable:
# echo $USER to see the variable

Britnu Salu