ИМЯ

pwconv, pwunconv, grpconv, grpunconv - convert between the system's shadowed and plain account files

СИНОПСИС

pwconv [options]

pwunconv [options]

grpconv [options]

grpunconv [options]

ОПИСАНИЕ

The pwconv command creates shadow from passwd and an optionally existing shadow.

The pwunconv command creates a plain passwd from shadowed passwd and shadow and then removes shadow.

The grpconv command creates gshadow from group and an optionally existing gshadow.

The grpunconv command creates plain group from shadowed group and gshadow and then removes gshadow.

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

Each program acquires the necessary locks before conversion. pwconv and grpconv are similar. First, entries in the shadowed file which don't exist in the plain file are removed. Then, entries in the shadowed file which don't have `x' as the password in plain file are updated. Any missing shadowed entries are added. Finally, passwords in the plain file are replaced with `x'. These programs can be used for initial conversion as well to update the shadowed file if the plain file has been edited by hand.

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

Likewise pwunconv and grpunconv are similar. Passwords in the plain file are updated from the shadowed file. Entries which exist in the plain 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.

ПАРАМЕТРЫ

The options which apply to the pwconv, pwunconv, grpconv, and grpunconv commands are:

-h, --help

-R, --root CHROOT_DIR

ОШИБКИ РЕАЛИЗАЦИИ

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 shadowed files.

НАСТРОЙКА

The following configuration variable in /etc/login.defs changes the behavior of grpconv and grpunconv:

MAX_MEMBERS_PER_GROUP (number)

The following configuration variables in /etc/login.defs change the behavior of pwconv:

PASS_MAX_DAYS (number)

PASS_WARN_AGE (number)

ФАЙЛЫ

/etc/login.defs

СМОТРИТЕ ТАКЖЕ

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