'\" t
.\"     Title: groupmod
.\"    Author: Julianne Frances Haugh
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 18/12/2025
.\"    Manual: Comandi per la gestione del sistema
.\"    Source: shadow-utils 4.6
.\"  Language: Italian
.\"
.TH "GROUPMOD" "8" "18/12/2025" "shadow\-utils 4\&.6" "Comandi per la gestione del si"
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
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.SH "NOME"
groupmod \- modifica la definizione di un gruppo del sistema
.SH "SINOSSI"
.HP \w'\fBgroupmod\fR\ 'u
\fBgroupmod\fR [\fIopzioni\fR] \fIGRUPPO\fR
.SH "DESCRIZIONE"
.PP
The
\fBgroupmod\fR
command modifies the definition of the specified
\fIGROUP\fR
by modifying the appropriate entry in the group database\&.
.SH "OPZIONI"
.PP
The options which apply to the
\fBgroupmod\fR
command are:
.PP
\fB\-g\fR, \fB\-\-gid\fR\ \&\fIGID\fR
.RS 4
The group ID of the given
\fIGROUP\fR
will be changed to
\fIGID\fR\&.
.sp
The value of
\fIGID\fR
must be a non\-negative decimal integer\&. This value must be unique, unless the
\fB\-o\fR
option is used\&.
.sp
Gli utenti che hanno il gruppo come gruppo primario verranno aggiornati per mantenere tale gruppo come loro gruppo primario\&.
.sp
Any files that have the old group ID and must continue to belong to
\fIGROUP\fR, must have their group ID changed manually\&.
.sp
No checks will be performed with regard to the
\fBGID_MIN\fR,
\fBGID_MAX\fR,
\fBSYS_GID_MIN\fR, or
\fBSYS_GID_MAX\fR
from
/etc/login\&.defs\&.
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
Mostra un messaggio di aiuto ed esce\&.
.RE
.PP
\fB\-n\fR, \fB\-\-new\-name\fR\ \&\fINEW_GROUP\fR
.RS 4
The name of the group will be changed from
\fIGROUP\fR
to
\fINEW_GROUP\fR
name\&.
.RE
.PP
\fB\-o\fR, \fB\-\-non\-unique\fR
.RS 4
When used with the
\fB\-g\fR
option, allow to change the group
\fIGID\fR
to a non\-unique value\&.
.RE
.PP
\fB\-p\fR, \fB\-\-password\fR\ \&\fIPASSWORD\fR
.RS 4
The encrypted password, as returned by
\fBcrypt\fR(3)\&.
.sp
\fBNote:\fR
This option is not recommended because the password (or encrypted password) will be visible by users listing the processes\&.
.sp
Ci si deve accertare che la password rispetti le norme delle password del sistema\&.
.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\&.
.RE
.PP
\fB\-P\fR, \fB\-\-prefix\fR\ \&\fIPREFIX_DIR\fR
.RS 4
Apply changes in the
\fIPREFIX_DIR\fR
directory and use the configuration files from the
\fIPREFIX_DIR\fR
directory\&. This option does not chroot and is intended for preparing a cross\-compilation target\&. Some limitations: NIS and LDAP users/groups are not verified\&. PAM authentication is using the host files\&. No SELINUX support\&.
.RE
.SH "CONFIGURAZIONE"
.PP
The following configuration variables in
/etc/login\&.defs
change the behavior of this tool:
.PP
\fBMAX_MEMBERS_PER_GROUP\fR (number)
.RS 4
Maximum members per group entry\&. When the maximum is reached, a new group entry (line) is started in
/etc/group
(with the same name, same password, and same GID)\&.
.sp
Il valore predefinito \(`e 0, che non pone nessun limite al numero di membri per gruppo\&.
.sp
Questa opzione (dividi gruppo) permette di limitare la lunghezza delle righe nel file \(Fogroup\(Fc\&. Questo \(`e utile per essere certi che le righe per gruppi NIS non eccedano i 1024 caratteri\&.
.sp
Se si deve impostare questo limite, si pu\(`o usare 25\&.
.sp
Nota: la divisione dei gruppi potrebbe non essere supportata da ogni strumento (anche all\*(Aqinterno del pacchetto Shadow)\&. Non si dovrebbe utilizzare questa variabile a meno di esserci forzati\&.
.RE
.SH "FILE"
.PP
/etc/group
.RS 4
Informazioni sugli account di gruppo\&.
.RE
.PP
/etc/gshadow
.RS 4
Informazioni sicure sugli account di gruppo\&.
.RE
.PP
/etc/login\&.defs
.RS 4
Configurazione del pacchetto password shadow
.RE
.PP
/etc/passwd
.RS 4
Informazioni sugli account utente\&.
.RE
.SH "VALORI RESTITUITI"
.PP
The
\fBgroupmod\fR
command exits with the following values:
.PP
\fI0\fR
.RS 4
E_SUCCESS: success
.RE
.PP
\fI2\fR
.RS 4
E_USAGE: invalid command syntax
.RE
.PP
\fI3\fR
.RS 4
E_BAD_ARG: invalid argument to option
.RE
.PP
\fI4\fR
.RS 4
E_GID_IN_USE: specified group doesn\*(Aqt exist
.RE
.PP
\fI6\fR
.RS 4
E_NOTFOUND: specified group doesn\*(Aqt exist
.RE
.PP
\fI9\fR
.RS 4
E_NAME_IN_USE: group name already in use
.RE
.PP
\fI10\fR
.RS 4
E_GRP_UPDATE: can\*(Aqt update group file
.RE
.PP
\fI11\fR
.RS 4
E_CLEANUP_SERVICE: can\*(Aqt setup cleanup service
.RE
.PP
\fI12\fR
.RS 4
E_PAM_USERNAME: can\*(Aqt determine your username for use with pam
.RE
.PP
\fI13\fR
.RS 4
E_PAM_ERROR: pam returned an error, see syslog facility id groupmod for the PAM error message
.RE
.SH "VEDERE ANCHE"
.PP
\fBchfn\fR(1),
\fBchsh\fR(1),
\fBpasswd\fR(1),
\fBgpasswd\fR(8),
\fBgroupadd\fR(8),
\fBgroupdel\fR(8),
\fBlogin.defs\fR(5),
\fBuseradd\fR(8),
\fBuserdel\fR(8),
\fBusermod\fR(8)\&.
