Sync users' Samba passwords with their system passwords

The pam_smbpass PAM module can be used to sync users' Samba passwords with their system passwords when the passwd command is used. 

If a user invokes the passwd command, the password the uses to log in to the system as well as the password he must provide to connect to a Samba share are changed.

To enable this feature, add the following line to /etc/pam.d/system-auth 

below the pam_cracklib.so invocation:

password required /lib/security/pam_smbpass.so nullok use_authtok try_first_pass