indeed.
In this case, your shell script relies on the destination machine
already having the utilities needed to decompress the files.
From the man page of tar(1):
-j Compress archive using bzip2. The bzip2 utility must be in-
stalled separately.
In the case of OpenBSD, bzip2 is not installed by default. So if the
interest here is portability, you are not going down the right path. I
would suggest something else, like gzip.
Again from the man page of tar:
-z Compress archive using gzip(1).
Creating such a package will *not* allow you to port it to any
UNIX/Linux system for 2 reasons (that I can think of). 1) bzip2 might
not be present. 2) I could be wrong (having never needed to install
fonts from their vendors), but I'd be willing to bet that fonts don't go
in the same place on every system.
If you are really only trying to distribute a package of fonts, you're
better off just distributing it as is, and telling people where to
extract it on a given system. If you look at most bundles of files in
unix, they are .tar.gz or .tgz. If everybody does it, there must be a
reason for it. Simpler is always better.