http://www.gentoo.org/doc/en/altinstall.xml#doc_chap6 Under the 'Requirements' section, there is a small typo of .tgz Currently reads: (by the way, a tarball is just a file ending in .tbz or .tar.gz). I assume .tbz should be .tgz or is it another extension of .bz2?
Nope, you read it correctly. tar (.tar) with bzip2 compression (.bz2) can be displayed as .tar.bz2 or .tbz. tar with gzip compression is .tgz. Heck, and that's just naming convention. In Linux, you can give files any extension that you want; programs look at the header of the file to see what kind it is, not at the extension (unlike Windows). The document is fine.
