Provided by: passwd_4.1.4.2-1ubuntu3_i386 bug

pwconv, pwunconv, grpconv, grpunconv -  shadow
pwconv
       pwunconv
       grpconv
       grpunconv

 4
       shadow /etc/passwd ", " /etc/group ", " /etc/shadow ", " /etc/gshadow

       pwconv   passwd   shadow  (  shadow  )  pwunconv  passwd  shadow passwd
       shadow grpconv  group  gshadow ( gshadow )  grpunconv   group   gshadow
       group gshadow

       pwconv

       grpconv

       shadow

       shadow
        `x'
        `x'

       shadow

       /etc/shadow pwconv  /etc/login.defs

       PASS_MIN_DAYS, PASS_MAX_DAYS, PASS_WARN_AGE

       pwunconv  grpunconv

       shadow

       shadow

        shadow

       pwunconv


()
       shadow shadow pwck  grpck

login.defs(5),
       grpck(8), pwck(8)

                                  26 Sep 1997                        PWCONV(8)