Find files under the given directory tree, recursively.
find {{root_path}} -name '{{*.ext}}'
find {{root_path}} -path '{{**/lib/**/*.ext}}'
find {{root_path}} -name '{{*.ext}}' -exec {{wc -l {} }}\;
find {{root_path}} -name '{{}}' -mtime {{-1d}}
find {{root_path}} -size +500k -size -10MB -iname '{{*.TaR.gZ}}'
find {{root_path}} -name '{{*.ext}}' -mtime {{-180d}} -delete
find {{root_path}} -empty
find {{root_path}} -name '{{*.py}}' -or -name '{{*.r}}'