In the absence of useful documentation:

To invoke zec:

/usr/games/zec host port country password


To invoke zecsh:

(from a running zsh instance)
source /usr/share/games/zec/zecsh
<M-x> zec hostname_or_ip tcpportnum country password

(where M-x is Meta-x)

You are advised not to run zecsh unless you know what you're doing.

Clint Adams <schizo@debian.org>
