Re: file extension

[Rick Troth]

> What
> does the .bz2 extension signify?

BZip (or BZip2).   It is replacing GZip in some areas.
In fact,  some FTP sites are going so far as to offer both
.gz and .bz (or .bz2) compressed copies of <whatever>
not unlike they did some years ago with both .Z and .gz.