Como alterar a codificação de senha para o blowfish para o cliente nis usando auth-client-config no ubuntu 18.04

Question

instalação do pam-unix2

resultado:

/etc/pam.d/common-password
password        [success=2 default=ignore]      pam_unix2.so obscure blowfish
password        sufficient                      pam_sss.so use_authtok

Redigite a nova senha:

crypt_r: Don't know 0
Error: Password NOT changed.
passwd: Authentication token manipulation error
passwd: password unchanged
auth-client-config -p  local_example -a
Error: '/etc/nsswitch.conf' not updated
Error: '/etc/pam.d/common-password' not updated
Error: '/etc/pam.d/common-auth' not updated
Error: '/etc/pam.d/common-session' not updated
Error: '/etc/pam.d/common-account' not updated