Provided by: passwd_4.1.1-6ubuntu6_i386 bug

NAMN
       pwck - validera integriteten för lösenordsfiler


SYNOPSIS
       pwck [-q] [-s] [passwd [ shadow ]]

       pwck [-q] [-r] [passwd shadow]


BESKRIVNING
       The pwck command verifies the integrity of the system authentication
       information. All entries in the /etc/passwd and /etc/shadow are checked
       to see that the entry has the proper format and valid data in each
       field. The user is prompted to delete entries that are improperly
       formatted or which have other uncorrectable errors.

       Kontroller görs för att validera att varje post har:

       ·   korrekt antal fält

       ·   ett unikt användarnamn

       ·   en giltig identifierare för användare och grupp

       ·   en giltig primär grupp

       ·   en giltig hemkatalog

       ·   ett giltigt inloggningsskal

       The checks for correct number of fields and unique user name are fatal.
       If the entry has the wrong number of fields, the user will be prompted
       to delete the entire line. If the user does not answer affirmatively,
       all further checks are bypassed. An entry with a duplicated user name
       is prompted for deletion, but the remaining checks will still be made.
       All other errors are warning and the user is encouraged to run the
       usermod command to correct the error.

       The commands which operate on the /etc/passwd file are not able to
       alter corrupted or duplicated entries.  pwck should be used in those
       circumstances to remove the offending entry.


FLAGGOR
       Flaggorna som gäller för kommandot pwck är:

       -q
           Report errors only. The warnings which do not require any action
           from the user won´t be displayed.

       -r
           Starta kommandot pwck i skrivskyddat läge.

       -s
           Sorterar poster i /etc/passwd och /etc/shadow efter UID.

       By default, pwck operates on the files /etc/passwd and /etc/shadow. The
       user may select alternate files with the passwd and shadow parameters.


CONFIGURATION
       The following configuration variables in /etc/login.defs change the
       behavior of this tool:

       PASS_MAX_DAYS (number)
           The maximum number of days a password may be used. If the password
           is older than this, a password change will be forced. If not
           specified, -1 will be assumed (which disables the restriction).

       PASS_MIN_DAYS (number)
           The minimum number of days allowed between password changes. Any
           password changes attempted sooner than this will be rejected. If
           not specified, -1 will be assumed (which disables the restriction).

       PASS_WARN_AGE (number)
           The number of days warning given before a password expires. A zero
           means warning is given only upon the day of expiration, a negative
           value means no warning is given. If not specified, no warning will
           be provided.


FILER
       /etc/group
           Gruppkontoinformation.

       /etc/passwd
           Användarkontoinformation.

       /etc/shadow
           Säker användarkontoinformation.


SE OCKSÅ
       group(5), passwd(5), shadow(5), usermod(8).


AVSLUTNINGSVÄRDEN
       Kommandot pwck avslutas med följande värden:

       0
           lyckad

       1
           ogiltig kommandosyntax

       2
           en eller flera felaktiga lösenordsposter

       3
           kan inte öppna lösenordsfiler

       4
           kan inte låsa lösenordsfiler

       5
           kan inte uppdatera lösenordsfiler