[TriLUG] how to unshadow

[Jon Carnes]

On Mon, 2002-11-04 at 13:04, Ryan Leathers wrote:
> 
> 
> Quick one I hope - - - im in a pinch - how do I unshadow my passwd 
> 	Is there a shell script - do I have to do it by hand - or is
> there a passwd argument
> 

pwunconv:
NAME
       pwconv,  pwunconv,  grpconv,  grpunconv  - convert to and from
shadow
       passwords and groups.

SYNOPSIS
       pwconv
       pwunconv
       grpconv
       grpunconv

DESCRIPTION
  These four programs all operate on the normal and shadow password and
  group  files: /etc/passwd, /etc/group, /etc/shadow, and /etc/gshadow.

  pwconv creates shadow from passwd and an optionally existing  shadow.
  pwunconv  creates  passwd  from  passwd  and  shadow and then removes
  shadow.  grpconv creates gshadow from group and an optionally  exist­
  ing gshadow.  grpunconv creates group from group and gshadow and then
  removes gshadow.

  Each program acquires the necessary locks before conversion.

  pwconv and grpconv are similiar.  First, entries in the shadowed file
  which  don't  exist  in  the  main  file are removed.  Then, shadowed
  entries which don't have `x' as the password in  the  main  file  are
  updated.  Any missing shadowed entries are added.  Finally, passwords
  in the main file are replaced with `x'.  These programs can  be  used
  for  initial  conversion  as  well to update the shadowed file if the
  main file is edited by hand.

  pwconv will use  the  values  of  PASS_MIN_DAYS,  PASS_MAX_DAYS,  and
  PASS_WARN_AGE   from  /etc/login.defs  when  adding  new  entries  to
  /etc/shadow.

  Likewise, pwunconv and grpunconv are similiar.  Passwords in the main
  file  are updated from the shadowed file.  Entries which exist in the
  main file but not in the shadowed file are left alone.  Finally,  the
  shadowed file is removed.

  Some password aging information is lost by pwunconv.  It will convert
  what it can.