115 lines
2.9 KiB
Groff
115 lines
2.9 KiB
Groff
.\"Generated by db2man.xsl. Don't modify this, modify the source.
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.de Sh \" Subsection
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.br
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.if t .Sp
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.ne 5
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.PP
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\fB\\$1\fR
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.PP
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..
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.de Sp \" Vertical space (when we can't use .PP)
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.if t .sp .5v
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.if n .sp
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..
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.de Ip \" List item
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.ie \\n(.$>=3 .ne \\$3
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.el .ne 3
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.IP "\\$1" \\$2
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..
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.TH "PWCK" 8 "" "" ""
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.SH NAME
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pwck \- verify integrity of password files
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.SH "SYNOPSIS"
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.ad l
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.hy 0
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.HP 5
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\fBpwck\fR [\-sr] [\fIpasswd\fR\ \fIshadow\fR]
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.ad
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.hy
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.SH "DESCRIPTION"
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.PP
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\fBpwck\fR verifies the integrity of the system authentication information\&. All entries in the \fI/etc/passwd\fR and \fI/etc/shadow\fR 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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.PP
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Checks are made to verify that each entry has:
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.TP 3
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\(bu
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the correct number of fields
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.TP
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\(bu
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a unique user name
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.TP
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\(bu
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a valid user and group identifier
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.TP
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\(bu
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a valid primary group
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.TP
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\(bu
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a valid home directory
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.TP
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\(bu
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a valid login shell
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.LP
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.PP
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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 \fBusermod\fR command to correct the error\&.
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.PP
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The commands which operate on the \fI/etc/passwd\fR file are not able to alter corrupted or duplicated entries\&. \fBpwck\fR should be used in those circumstances to remove the offending entry\&.
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.SH "OPTIONS"
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.PP
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By default, \fBpwck\fR operates on the files \fI/etc/passwd\fR and \fI/etc/shadow\fR\&. The user may select alternate files with the \fIpasswd\fR and \fIshadow\fR parameters\&. Additionally, the user may execute the command in read\-only mode by specifying the \fB\-r\fR flag\&. This causes all questions regarding changes to be answered \fIno\fR without user intervention\&. \fBpwck\fR can also sort entries in \fI/etc/passwd\fR and \fI/etc/shadow\fR by UID\&. To run it in sort mode pass it \fB\-s\fR flag\&. No checks are performed then, it just sorts\&.
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.SH "FILES"
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.TP
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\fI/etc/group\fR
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group account information
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.TP
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\fI/etc/passwd\fR
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user account information
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.TP
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\fI/etc/shadow\fR
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secure user account information
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.SH "SEE ALSO"
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.PP
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\fBgroup\fR(5), \fBpasswd\fR(5), \fBshadow\fR(5), \fBusermod\fR(8)
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.SH "EXIT VALUES"
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.PP
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The \fBpwck\fR command exits with the following values:
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.TP
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\fI0\fR
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success
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.TP
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\fI1\fR
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invalid command syntax
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.TP
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\fI2\fR
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one or more bad password entries
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.TP
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\fI3\fR
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can't open password files
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.TP
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\fI4\fR
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can't lock password files
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.TP
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\fI5\fR
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can't update password files
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.SH "AUTHOR"
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.PP
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Julianne Frances Haugh (jockgrrl@ix\&.netcom\&.com)
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