the regexp has errors: 
Nested quantifiers in regex  marked by <-- HERE in m/^/usr/(/[^/]+{ <-
+- HERE 0,1})/bin//

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Two expressions is fine,is there a one liner, as this could increase in future...?

In reply to Re^2: dir match, dir may or may not appear by hellosarathy
in thread dir match, dir may or may not appear by hellosarathy

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