In the Linux world, tarball refers to a compressed tar archive file. The most common type uses gzip compression and the file typically ends in tar.gz or .tgz. The tar command itself has its origin in Unix systems where is was used to save files to magnetic tape. The name tar stands for Tape ARchive.
OK, the move to a new server is now complete. Hopefully, having the site on a more powerful server will prevent my account from being suspended due to high server loads. I’m not sure if the site performance will improve at all. Comments are now re-enabled.