What is the difference between a shell variable that is
exported and the one that is not exported?
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Answer Posted / mahendra swain
When we export the variable that will available in subshell
If simply define variable that is only available in current shell.
Example: #var=20
#echo $var
20
If you invoke #sh i.e subshell of bash and try to print that unexported variable valu you will not get that.
sh-2.05b# echo $var-----it does not print the valu of var b'caz still it is in bash shell memory.
Just see the exported variable in shell
[root@dhcppc0 root]# export var1=30
[root@dhcppc0 root]# sh
sh-2.05b# echo $var1
30
I hope you will be enjoy it.
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