ckpasswd and others

[William Pimentel]

Hello

where can i find the command line options for ckpasswd? Does it work
with RedHat 6.1??, i don't seem to be able to get it to work so that i
can authenticate by the system's shadow file. BTW this is my auth realm
in readers.conf:

auth "mydomain" {
        hosts: "*"
        auth: "ckpasswd -s"
        default: "<FAIL>"
        default-domain: "mydomain.com"
}

I also see that there are other authenticators (pwcheck  and radius) but
i don't know how to use them

Thanx in advance.