N.rar

Novel Genetic Lineages of Rickettsia helvetica Associated with Ixodes apronophorus and Ixodes trianguliceps Ticks * Yana Igolkina. National Institutes of Health (.gov)

If you are looking for this tool, it is often used by members of the Usenet or data-hoarding communities to manage multi-part downloads. If you were referring to something else, such as:

View topic - A small utility to automatically unpar and unrar files

If you'd like, I can help you for the Par-N-Rar utility or provide specific commands for using it in a script.

Novel Genetic Lineages of Rickettsia helvetica Associated ... - PMC

: If an extraction fails, the program typically avoids deleting the source archives.