Re: How can I rescue my passwd file after corrupting it (and why does it still work) ?
On Sun, Nov 22, 2009 at 08:14:00AM +, Matthew Seaman typed:
>
> % pw user show -n matthew
> matthew:*:1001:1001::0:0:Matthew Seaman:/home/matthew:/bin/tcsh
>
> prints out the master.passwd entry for the user account but *without* the
> password crypt-text. You can use:
>
> % pw user show -a
>
> to get a list of all users. This should use spwd.db rather than the
> original
> flat files -- it will enumerate all users from LDAP or NIS if your machine
> is
> configured to use those. Unfortunately, you will have to merge in the
> crypted
> password strings by hand or else get all your users to set new passwords.
Another way to recover is using perl:
while ( ($name,$passwd,$uid,$gid,$quota,$comment,$gcos,$dir,$shell,$expire) =
getpwent ) {
print $name . ":" . $passwd . ":" . $uid . ":" . $gid . "::0:" .
$expire . ":" . $gcos . ":" .$dir . ":" . $shell . "\n";
}
This will generate a file you can use to replace master.passwd, without
login class or passwd last changed information (if you use that) but
including the encrypted password.
Ruben
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Re: How can I rescue my passwd file after corrupting it (and why does it still work) ?
George Sanders wrote: I do some automated account creation on a FreeBSD 6.x system ... and unbeknownst to me, the '/' filesystem was completely full when I did my last account creation, resulting in: /: write failed, filesystem is full pwd_mkdb: /etc/pwd.db to /etc/pwd.db.tmp: No space left on device pw: passwd file update: No space left on device pwd_mkdb: corrupted entry pwd_mkdb: at line #187 pwd_mkdb: /mnt/etc/master.passwd: Inappropriate file type or format My situation is now as follows: passwd and master.passwd have a lot of lines missing, and one or two mangled lines toward the end. So a LOT of user accounts are gone. BUT, all of those missing accounts still work. So ... 1) why do all of the accounts that are missing from both passwd and master.passwd continue to work properly (they can authenticate and log in over SSH and so on) ? 2) how can I get back to healthy ? I suspect that somehow my (s)pwd.db files are still healthy ... is it possible to reconstruct complete passwd/master.passwd files using the existing (s)pwd.db files ? There's a backup copy of master.passwd, groups and aliases stored in /var/backups every time any of those files are changed -- the backups are created by the overnight periodic cron jobs, so you should be able to restore yesterday's status quo. Otherwise, you can sort of reconstruct the missing entries from yor master.passwd file by using pw(8) -- eg: % pw user show -n matthew matthew:*:1001:1001::0:0:Matthew Seaman:/home/matthew:/bin/tcsh prints out the master.passwd entry for the user account but *without* the password crypt-text. You can use: % pw user show -a to get a list of all users. This should use spwd.db rather than the original flat files -- it will enumerate all users from LDAP or NIS if your machine is configured to use those. Unfortunately, you will have to merge in the crypted password strings by hand or else get all your users to set new passwords. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW signature.asc Description: OpenPGP digital signature
How can I rescue my passwd file after corrupting it (and why does it still work) ?
I do some automated account creation on a FreeBSD 6.x system ... and unbeknownst to me, the '/' filesystem was completely full when I did my last account creation, resulting in: /: write failed, filesystem is full pwd_mkdb: /etc/pwd.db to /etc/pwd.db.tmp: No space left on device pw: passwd file update: No space left on device pwd_mkdb: corrupted entry pwd_mkdb: at line #187 pwd_mkdb: /mnt/etc/master.passwd: Inappropriate file type or format My situation is now as follows: passwd and master.passwd have a lot of lines missing, and one or two mangled lines toward the end. So a LOT of user accounts are gone. BUT, all of those missing accounts still work. So ... 1) why do all of the accounts that are missing from both passwd and master.passwd continue to work properly (they can authenticate and log in over SSH and so on) ? 2) how can I get back to healthy ? I suspect that somehow my (s)pwd.db files are still healthy ... is it possible to reconstruct complete passwd/master.passwd files using the existing (s)pwd.db files ? Thank you. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
