Split an openpgp keyring
splitkeys [ maxkeys ]
Splits an OpenPGP keyring into a bunch of keyrings of the format splitfile-%d.pgp, all of which contain no more than maxkeys keys (or 10000 if not specified).
splitkeys 1000 < keyring.gpg
Split keyring.gpg into a collection of keyrings all containing 1000 keys at most.
splitkeys was written by Jonathan McDowell <[email protected]>. It can be found as part of onak at http://www.earth.li/projectpurple/progs/onak.html