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.\" Manual: System Management Commands
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.\" Source: System Management Commands
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.TH "PWCK" "8" "04/03/2008" "System Management Commands" "System Management Commands"
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.TH "PWCK" "8" "04/15/2009" "System Management Commands" "System Management Commands"
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command verifies the integrity of the system authentication information\. All entries in the
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command verifies the integrity of the system authentication information\&. All entries in the
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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\.
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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\&.
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Checks are made to verify that each entry has:
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\h'-04'\(bu\h'+03'a valid login shell
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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
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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
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command to correct the error\.
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command to correct the error\&.
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The commands which operate on the
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file are not able to alter corrupted or duplicated entries\.
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file are not able to alter corrupted or duplicated entries\&.
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should be used in those circumstances to remove the offending entry\.
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should be used in those circumstances to remove the offending entry\&.
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The options which apply to the
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Report errors only\. The warnings which do not require any action from the user won\'t be displayed\.
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Report errors only\&. The warnings which do not require any action from the user won\'t be displayed\&.
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command in read\-only mode\.
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command in read\-only mode\&.
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operates on the files
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\fI/etc/shadow\fR\. The user may select alternate files with the
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\fI/etc/shadow\fR\&. The user may select alternate files with the
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.SH "CONFIGURATION"
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The following configuration variables in
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\fI/etc/login\.defs\fR
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\fI/etc/login\&.defs\fR
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change the behavior of this tool:
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\fBPASS_MAX_DAYS\fR (number)
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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)\.
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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)\&.
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\fBPASS_MIN_DAYS\fR (number)
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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)\.
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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)\&.
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\fBPASS_WARN_AGE\fR (number)
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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\.
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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\&.
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Group account information\.
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Group account information\&.
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\fI/etc/passwd\fR
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User account information\.
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User account information\&.
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\fI/etc/shadow\fR
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Secure user account information\.
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Secure user account information\&.
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.SH "EXIT VALUES"
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man/pwck.8
