$ /usr/sbin/rpcinfo -u server ypserv
program 100004 version 1 ready and waiting

( 100004  1   )
program 100004 version 2 ready and waiting

( 100004  2   )

  ypbind ,     portmap:

$ /usr/sbin/rpcinfo -u localhost ypbind

program 100007 version 1 ready and waiting
( 100004  1   )
program 100007 version 2 ready and waiting
( 100004  2   )

  rpcinfo  ,  ypbind   , ,  ypbind
:

$ /shin/service ypbind status

ypbind (pid 28689 28688 28687 28683) is running...   ()

 NIS    ,  ypbind    , 
       :

ft /shin/service ypbind stop

Shutting down NIS services:   (  HIS)                   [ OK ]
# /sbin/ypbind -debug

 -debug  ypbind        -
        .

yppasswd:   NIS

 yppasswd (    yppasswdd   d  , . 
"yppasswdd:    NIS"    ),  
 NIS,    passwd  ,  NIS  
 .  passwd      /etc/shadow
  , a yppasswd      /etc/shadow
  NIS u   NIS shadow, byname.  yppasswd -
        /etc/passwd   
passwd.byname.

 yppasswd        NIS, 
NIS   .  yppasswd     root  -
 ;   NIS      UID < 500.  -
        passwd.

   yppasswd    NIS    yppasswdd.

 passwd  yppasswd

 ,     NIS, 
     passwd,      ,  
  :    yppasswd.  root 
         passwd.  -

 21. NIS:                                    663