Converting Linux passwd to FreeBSD

Paul Hamilton paul at
Tue Jun 10 05:08:17 PDT 2003

If your users use pop3, you could record their pop3 user name and passwords,
since they are transmitted in clear text.  Some pop3 servers can even log
the username-password.  That would get you most of the users, depending on
the time frame (as some users will be away-dormant etc).


Paul Hamilton

-----Original Message-----
From: owner-freebsd-questions at
[mailto:owner-freebsd-questions at]On Behalf Of Benjamin Mayer
Sent: Tuesday, 10 June 2003 5:41 AM
To: freebsd-questions at
Subject: Re: Converting Linux passwd to FreeBSD

On Tue, 10 Jun 2003 08:25:27 +0700 (ICT)
Olivier Nicole <on at> wrote:

> > Is anyone familiar with a tool to convert my Linux passwd files to
> > so I don't have to manually recreate the accounts?
> I'd say, as the passwords are cripted with a non reversible function,
> either both systems use the same function and you don't have to
> convert anything, else you're dead. There is no way to get the clear
> text password knowing the crypted one, so there is no way to convert.

If they are not the same function you could always dictionary and brute
force attack the passwords. In my experience this should get you most of the
passwords. The ones you dont get you may have to have people assign a new
password for themselves.

I know it is not pretty, but if worst comes to worst.

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