Provided by: passwd_4.1.4.2+svn3283-3ubuntu5_i386 bug

CONFIGURATION
       The following configuration variables in /etc/login.defs change the
       behavior of this tool:

       CHFN_RESTRICT (string)
           This parameter specifies which values in the gecos field of the
           /etc/passwd file may be changed by regular users using the chfn
           program. It can be any combination of letters f, r, w, h, for Full
           name, Room number, Work phone, and Home phone, respectively. For
           backward compatibility, yes is equivalent to rwh and no is
           equivalent to frwh. If not specified, only the superuser can make
           any changes. The most restrictive setting is better achieved by not
           installing chfn SUID.

       /etc/login.defs

       /etc/passwd

       chsh(1), login.defs(5), passwd(5).

                                  04/09/2012                           chfn(1)