: The bundle is compressed using the XZ compression format (based on the LZMA2 algorithm), which typically offers higher compression ratios than the standard .gz (gzip) format.
First, you'll need to download the zlib 1.2.13 package. The package might be named something like zlib-1.2.13.tar.xz , reflecting the string you provided. zlib1213tarxz
zlib is distributed under the (very permissive, allows commercial use). : The bundle is compressed using the XZ
Exploring zlib 1.2.13: The Latest in Data Compression Technology zlib1213tarxz