pwunconv(8) System Manager's Manual pwunconv(8)NAME
pwunconv - convert from shadow account
SYNOPSIS
pwunconv [-P path]
DESCRIPTION
pwunconv moves the passwords from /etc/shadow to /etc/passwd. The shadow file will be removed afterwards. All password aging informations
will go lost.
OPTIONS -P, --path path
The passwd and shadow files are located below the specified directory path. pwunconv will use this files, not /etc/passwd and
/etc/shadow.
FILES
passwd - user account information
shadow - shadow user account information
SEE ALSO passwd(1), passwd(5), shadow(5), pwck(8), pwconv(8)AUTHOR
Thorsten Kukuk <kukuk@suse.de>
pwdutils January 2004 pwunconv(8)
Check Out this Related Man Page
PWCONV(8) System Manager's Manual PWCONV(8)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 existing 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.
BUGS
Errors in the password or group files (such as invalid or duplicate entries) may cause these programs to loop forever or fail in other
strange ways. Please run pwck and grpck to correct any such errors before converting to or from shadow passwords or groups.
SEE ALSO login.defs(5), grpck(8), pwck(8)
26 Sep 1997 PWCONV(8)
Can some one explain to me how to disable the Shadow file or disconnect it from the passwd file. I am trying to configure a UNIX SCO box to use NIS and it continues to look at its own Shadow file. Thanks (5 Replies)
Hi all,
I have upgraded my old RedHat 6.2 box to RedHat 7.3. I had couple hundreds of users on that box so i just migrated all the user account to a new box by transfering home directories, and appending to /etc/passwd /etc/shadow /etc/group. I have preserved all permittions. Everything works... (8 Replies)
Dear Forum,
I had this case before, all of sudden all users including root can't login. What done is by connecting to console port and resetting root password, "pwunconv" command, reboot server.
My question is, how this can happen???
thanks
:confused: (3 Replies)
Hi,
Is it possible to convert MD5 passwords to SHA-512?
I'm about to migrate an old slackware server to Debian, then I noticed that they don't use same encryption method.
I'm aware that I can change the encryption method in Debian to MD5, but as far as I understand SHA-512 is more secure,... (2 Replies)
Hi,
I need to convert few HP-UX (V 11.31) machines from un-trusted to trusted.
I used the HP SMH to do this on one server. However when I click on "Yes" to proceed with the conversion, I get this error :
The attempt to convert this system to a trusted system failed.
The command return value... (2 Replies)