The `zip` command on Ubuntu is 6.0, which was released in 2009 and does not support zstd. It does support bzip2 though!

> The `zip` command on Ubuntu is 6.0, which was released in 2009 and does not support zstd. It does support bzip2 though!

You probably mean the "unzip" command, which https://infozip.sourceforge.net/UnZip.html lists as 6.0 being the latest, released on 20 April 2009. Relevant to this discussion, new in that release are support for 64-bit file sizes, bzip2 compression method, and UTF-8 filenames.

The "zip" command is listed at https://infozip.sourceforge.net/Zip.html as 3.0 being the latest, released on 7 July 2008. New in that release are also support for 64-bit file sizes, bzip2 compression method, and UTF-8 filenames.

It would be great if both (or at least unzip) were updated to also support LZMA/XZ/ZSTD as compression methods, but given that there have been no new releases for over fifteen years, I'm not too hopeful.

> It would be great if both (or at least unzip) were updated to also support LZMA/XZ/ZSTD as compression methods,

Why ? Xz supports xz, zstd supports zstd. Why should unzip support xz or rar or gz ?

i meant the "zip support" (as in zlib) with zstd command.