Recursively rename files using find and sed

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To solve it in a way most close to the original problem would be probably using xargs “args per command line” option:

find . -name "*_test.rb" | sed -e "p;s/test/spec/" | xargs -n2 mv

It finds the files in the current working directory recursively, echoes the original file name (p) and then a modified name (s/test/spec/) and feeds it all to mv in pairs (xargs -n2). Beware that in this case the path itself shouldn’t contain a string test.

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