Robert J. Hansen rjh at
Wed Jun 27 06:55:50 CEST 2018

>     $ gpg2 -k
>     gpg: invalid item 'BZIP2' in preference string
>     gpg: invalid default preferences

Try "gpg2 --version" and look for a line like:

Compression: Uncompressed, ZIP, ZLIB, BZIP2

... I suspect you'll discover whoever compiled your GnuPG 2 neglected to
include support for the BZIP2 algorithm.

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