Polecenie yppasswdd

Specify a directory that contains the passwd and shadow files for rpc.yppasswdd to use instead of /etc/passwd and /etc/shadow. Useful to prevent all users in the NIS database from automatically gaining access to the NIS server.

Permit users to change the shell or user information in the GECOS field of their passwd entry. By default, rpc.yppasswdd does not permit users to change these fields.

Specify a program to edit the passwd and shadow files instead of rpc.yppasswdd. The program should return 0 for successful completion; 1 for successful completion, but the pwupdate program should not be run to update the NIS server's maps; and anything else if the change failed.

Specify an alternative passwd file to /etc/passwd, to prevent all users in the NIS database from automatically gaining access to the NIS server.

Specify a port that rpc.yppasswdd will try to register itself, allowing a router to filter packets to the NIS ports.

Use shadowfile instead of /etc/passwd for shadow password support.

Print version information and whether the package was compiled with CHECKROOT.

Modify files using the specified program instead of using internal default functions. rpc.yppasswdd passes information to program in the following format:

username o:oldpassword p:password s:shell g:gcos

Any of the fields p, s, or g may be missing.