'\" t
.\"     Title: pwck
.\"    Author: Julianne Frances Haugh
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 21/06/2024
.\"    Manual: System Management Commands
.\"    Source: shadow-utils 4.15.2
.\"  Language: Italian
.\"
.TH "PWCK" "8" "21/06/2024" "shadow\-utils 4\&.15\&.2" "System Management Commands"
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.SH "NOME"
pwck \- verify the integrity of password files
.SH "SINOSSI"
.HP \w'\fBpwck\fR\ 'u
\fBpwck\fR [options] [\fIPASSWORDFILE\fR\ [\ \fISHADOWFILE\fR\ ]]
.SH "DESCRIZIONE"
.PP
The
\fBpwck\fR
command verifies the integrity of the users and authentication information\&. It checks that all entries in
/etc/passwd
and
/etc/shadow
have the proper format and contain valid data\&. The user is prompted to delete entries that are improperly formatted or which have other uncorrectable errors\&.
.PP
Vengono fatti controlli per verificare che ogni voce abbia:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
il corretto numero di campi
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
un nome utente univoco e valido
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
identificatori validi dell\*(Aqutente e del gruppo
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
un gruppo primario valido
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
una home directory valida
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
una shell di login valida
.RE
.PP
Checks for shadowed password information are enabled when the second file parameter
\fISHADOWFILE\fR
is specified or when
/etc/shadow
exists on the system\&.
.PP
Le verifiche sono le seguenti:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
ogni elemento del file passwd deve avere un corrispondente elemento in shadow, e viceversa
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
le password sono specificate nel file shadow
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
gli elementi di shadow hanno il corretto numero di campi
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
gli elementi di shadow sono unici
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
le date di ultima modifica non sono nel futuro
.RE
.PP
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 warnings and the user is encouraged to run the
\fBusermod\fR
command to correct the error\&.
.PP
The commands which operate on the
/etc/passwd
file are not able to alter corrupted or duplicated entries\&.
\fBpwck\fR
should be used in those circumstances to remove the offending entry\&.
.SH "OPZIONI"
.PP
The
\fB\-r\fR
and
\fB\-s\fR
options cannot be combined\&.
.PP
The options which apply to the
\fBpwck\fR
command are:
.PP
\fB\-\-badname\fR\ \&
.RS 4
Allow names that do not conform to standards\&.
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
Mostra un messaggio di aiuto ed esce\&.
.RE
.PP
\fB\-q\fR, \fB\-\-quiet\fR
.RS 4
Riporta solo gli errori\&. Gli avvisi che non richiedono azioni da parte dell\*(Aqutente non sono mostrati\&.
.RE
.PP
\fB\-r\fR, \fB\-\-read\-only\fR
.RS 4
Execute the
\fBpwck\fR
command in read\-only mode\&.
.RE
.PP
\fB\-R\fR, \fB\-\-root\fR\ \&\fICHROOT_DIR\fR
.RS 4
Apply changes in the
\fICHROOT_DIR\fR
directory and use the configuration files from the
\fICHROOT_DIR\fR
directory\&. Only absolute paths are supported\&.
.RE
.PP
\fB\-s\fR, \fB\-\-sort\fR
.RS 4
Sort entries in
/etc/passwd
and
/etc/shadow
by UID\&.
.RE
.PP
By default,
\fBpwck\fR
operates on the files
/etc/passwd
and
/etc/shadow\&. The user may select alternate files with the
\fIpasswd\fR
and
\fIshadow\fR
parameters\&.
.SH "CONFIGURAZIONE"
.PP
The following configuration variables in
/etc/login\&.defs
change the behavior of this tool:
.SH "FILE"
.PP
/etc/group
.RS 4
Informazioni sugli account di gruppo\&.
.RE
.PP
/etc/passwd
.RS 4
Informazioni sugli account utente\&.
.RE
.PP
/etc/shadow
.RS 4
Informazioni sicure sugli account utente\&.
.RE
.SH "VALORI RESTITUITI"
.PP
The
\fBpwck\fR
command exits with the following values:
.PP
\fI0\fR
.RS 4
success
.RE
.PP
\fI1\fR
.RS 4
invalid command syntax
.RE
.PP
\fI2\fR
.RS 4
one or more bad password entries
.RE
.PP
\fI3\fR
.RS 4
can\*(Aqt open password files
.RE
.PP
\fI4\fR
.RS 4
can\*(Aqt lock password files
.RE
.PP
\fI5\fR
.RS 4
can\*(Aqt update password files
.RE
.PP
\fI6\fR
.RS 4
can\*(Aqt sort password files
.RE
.SH "VEDERE ANCHE"
.PP
\fBgroup\fR(5),
\fBgrpck\fR(8),
\fBpasswd\fR(5),
\fBshadow\fR(5),
\fBusermod\fR(8)\&.