cat *zip > big.zip && unzip big.zip You might be able to just throw it down a pipe cat *zip | unzip -, but I’m not sure about that.

While unzip seems not to support multipart archives (you’d need to concatenate them into a single archive first), unar or 7zip seem to be working. However, the files would need to be named archive.z01, archive.z02, … , archive.zip

https://unix.stackexchange.com/questions/40480/how-to-unzip-a-multipart-spanned-zip-on-linux