$ grep -rl "#recursion" ./posts/
#Recursion
2 entries./interview/10-31119. Pascal's Triangle IICoding10-31118. Pascal's TriangleCoding
$ cd .. — all tags
$ grep -rl "#recursion" ./posts/
./interview/10-31119. Pascal's Triangle IICoding10-31118. Pascal's TriangleCoding
$ cd .. — all tags
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