best way to remotely manage user credentials

["Wojciech Ziniewicz" <wojciech.ziniewicz@gmail.com>]

Hello
I would like to hear some word in my problem.
I have X servers with pam authentication and  ssh daemon.
People use ftp servers and run their applications but there should be
one central server that will manage passwords and users.

I would like to use something like

/usr/bin/changepassword <server_address> <user> <newpassword>

there's no problem writing such thing with bash and ssh keys but maybe
someone knows better solution ?

regards
WZ

-- 
Wojciech Ziniewicz
Unix SEX :{look;gawk;find;sed;talk;grep;touch;finger;find;fl
ex;unzip;head;tail; mount;workbone;fsck;yes;gasp;fsck;more;yes;yes;eje
ct;umount;makeclean; zip;split;done;exit:xargs!!;)}