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You have to use when you want to build a variable name using another variable. like dir_1 using variable n.


cgi@tioman> (/home/cgi) $ dir_1="abc"
cgi@tioman> (/home/cgi) $ n=1
cgi@tioman>...

Welcome to the forum!

As far as I know, bash doesn't allow such thing as ${dir_$n}.
I'd use array instead:
dir[$a]=someValue;
echo ${dir[$a]}
Array indices can be strings, too.

To loop...