Hi all,

Want to know what does export command do??
What is its functionality?

And on a shell prompt

$at=1
$ echo $at
1

The variable above is it available to other script???

It takes a local variable and makes it global.

Try running a script that calls a function or another script. If the secondary script or function sets a LOCAL variable, it is gone when that function of script returns to the parent. If that variable is exported, it is a GLOBAL variable that will remain.

1:-Want to know what does export command do??
What is its functionality?

The Best way to approach .. Go for the man page of "export" and "env" command.

2:- $at=1
$ echo $at
1
The variable above is it available to other script???

NO, It will be only for that terminal/shell. But if you want use that variable into your another scripts. You must have export it.

Thanks
Sanjay

this might give you more insight