diff options
Diffstat (limited to 'man/it/man1/su.1')
| -rw-r--r-- | man/it/man1/su.1 | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/man/it/man1/su.1 b/man/it/man1/su.1 new file mode 100644 index 0000000..5b719a3 --- /dev/null +++ b/man/it/man1/su.1 @@ -0,0 +1,448 @@ +'\" t +.\" Title: su +.\" Author: Julianne Frances Haugh +.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/> +.\" Date: 23/01/2020 +.\" Manual: Comandi utente +.\" Source: shadow-utils 4.8.1 +.\" Language: Italian +.\" +.TH "SU" "1" "23/01/2020" "shadow\-utils 4\&.8\&.1" "Comandi utente" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NOME" +su \- cambia ID utente o diventa amministratore +.SH "SINOSSI" +.HP \w'\fBsu\fR\ 'u +\fBsu\fR [\fIopzioni\fR] [\fI\-\fR] [\fInome\fR\ [\ \fIargs\fR\ ]] +.SH "DESCRIZIONE" +.PP +The +\fBsu\fR +command is used to become another user during a login session\&. Invoked without a +\fBusername\fR, +\fBsu\fR +defaults to becoming the superuser\&. The +\fB\-\fR +option may be used to provide an environment similar to what the user would expect had the user logged in directly\&. The +\fB\-c\fR +option may be used to treat the next argument as a command by most shells\&. +.PP +Options are recognized everywhere in the argument list\&. You can use the +\fB\-\-\fR +argument to stop option parsing\&. The +\fB\-\fR +option is special: it is also recognized after +\fB\-\-\fR, but has to be placed before +\fBusername\fR\&. +.PP +All\*(Aqutente viene quindi chiesta la password, se necessario\&. Una password errata viene segnalata da un messaggio d\*(Aqerrore\&. Viene effettuato il log di tutti i tentativi, siano essi riusciti o meno, al fine di rilevare ogni abuso del sistema\&. +.PP +The current environment is passed to the new shell\&. The value of +\fB$PATH\fR +is reset to +/bin:/usr/bin +for normal users, or +/sbin:/bin:/usr/sbin:/usr/bin +for the superuser\&. This may be changed with the +\fBENV_PATH\fR +and +\fBENV_SUPATH\fR +definitions in +/etc/login\&.defs\&. +.PP +Un sottosistema di login \(`e indicato dalla presenza del carattere \(Fo*\(Fc all\*(Aqinizio della shell di login\&. La directory home impostata sar\(`a utilizzata come root di un nuovo file system al quale l\*(Aqutente accede\&. +.SH "OPZIONI" +.PP +The options which apply to the +\fBsu\fR +command are: +.PP +\fB\-c\fR, \fB\-\-command\fR\ \&\fICOMMAND\fR +.RS 4 +Specify a command that will be invoked by the shell using its +\fB\-c\fR\&. +.sp +The executed command will have no controlling terminal\&. This option cannot be used to execute interactive programs which need a controlling TTY\&. +.RE +.PP +\fB\-\fR, \fB\-l\fR, \fB\-\-login\fR +.RS 4 +Fornisce un ambiente simile a quello che un utente si attende quando effettua direttamente il login\&. +.sp +When +\fB\-\fR +is used, it must be specified before any +\fBusername\fR\&. For portability it is recommended to use it as last option, before any +\fBusername\fR\&. The other forms (\fB\-l\fR +and +\fB\-\-login\fR) do not have this restriction\&. +.RE +.PP +\fB\-s\fR, \fB\-\-shell\fR\ \&\fISHELL\fR +.RS 4 +La shell che verr\(`a invocata\&. +.sp +The invoked shell is chosen from (highest priority first): +.PP +.RS 4 +The shell specified with \-\-shell\&. +.RE +.PP +.RS 4 +If +\fB\-\-preserve\-environment\fR +is used, the shell specified by the +\fB$SHELL\fR +environment variable\&. +.RE +.PP +.RS 4 +The shell indicated in the +/etc/passwd +entry for the target user\&. +.RE +.PP +.RS 4 +/bin/sh +if a shell could not be found by any above method\&. +.RE +.sp +If the target user has a restricted shell (i\&.e\&. the shell field of this user\*(Aqs entry in +/etc/passwd +is not listed in +/etc/shells), then the +\fB\-\-shell\fR +option or the +\fB$SHELL\fR +environment variable won\*(Aqt be taken into account, unless +\fBsu\fR +is called by root\&. +.RE +.PP +\fB\-m\fR, \fB\-p\fR, \fB\-\-preserve\-environment\fR +.RS 4 +Preserve the current environment, except for: +.PP +\fB$PATH\fR +.RS 4 +reset according to the +/etc/login\&.defs +options +\fBENV_PATH\fR +or +\fBENV_SUPATH\fR +(see below); +.RE +.PP +\fB$IFS\fR +.RS 4 +reset to +\(Fo<space><tab><newline>\(Fc, if it was set\&. +.RE +.sp +If the target user has a restricted shell, this option has no effect (unless +\fBsu\fR +is called by root)\&. +.sp +Note that the default behavior for the environment is the following: +.PP +.RS 4 +The +\fB$HOME\fR, +\fB$SHELL\fR, +\fB$USER\fR, +\fB$LOGNAME\fR, +\fB$PATH\fR, and +\fB$IFS\fR +environment variables are reset\&. +.RE +.PP +.RS 4 +If +\fB\-\-login\fR +is not used, the environment is copied, except for the variables above\&. +.RE +.PP +.RS 4 +If +\fB\-\-login\fR +is used, the +\fB$TERM\fR, +\fB$COLORTERM\fR, +\fB$DISPLAY\fR, and +\fB$XAUTHORITY\fR +environment variables are copied if they were set\&. +.RE +.PP +.RS 4 +If +\fB\-\-login\fR +is used, the +\fB$TZ\fR, +\fB$HZ\fR, and +\fB$MAIL\fR +environment variables are set according to the +/etc/login\&.defs +options +\fBENV_TZ\fR, +\fBENV_HZ\fR, +\fBMAIL_DIR\fR, and +\fBMAIL_FILE\fR +(see below)\&. +.RE +.PP +.RS 4 +If +\fB\-\-login\fR +is used, other environment variables might be set by the +\fBENVIRON_FILE\fR +file (see below)\&. +.RE +.sp +.RE +.SH "AVVISI/CAVEAT" +.PP +This version of +\fBsu\fR +has many compilation options, only some of which may be in use at any particular site\&. +.SH "CONFIGURAZIONE" +.PP +The following configuration variables in +/etc/login\&.defs +change the behavior of this tool: +.PP +\fBCONSOLE\fR (string) +.RS 4 +Se definito, o il percorso completo di un file che contiene l\*(Aqelenco di nomi di device (uno per riga) oppure un elenco di nomi di device separati da \(Fo:\(Fc\&. L\*(Aqaccesso come root verr\(`a permesso solo attraverso questi device\&. +.sp +Se non definito, root potr\(`a accedere da qualsiasi device\&. +.sp +Il nome di device deve essere specificato senza il prefisso /dev\&. +.RE +.PP +\fBCONSOLE_GROUPS\fR (string) +.RS 4 +List of groups to add to the user\*(Aqs supplementary groups set when logging in on the console (as determined by the CONSOLE setting)\&. Default is none\&. + +Use with caution \- it is possible for users to gain permanent access to these groups, even when not logged in on the console\&. +.RE +.PP +\fBDEFAULT_HOME\fR (boolean) +.RS 4 +Indica se permettere l\*(Aqaccesso al sistema anche se non si pu\(`o accedere alla directory home\&. Il valore predefinito \(`e no\&. +.sp +If set to +\fIyes\fR, the user will login in the root (/) directory if it is not possible to cd to her home directory\&. +.RE +.PP +\fBENV_HZ\fR (string) +.RS 4 +If set, it will be used to define the HZ environment variable when a user login\&. The value must be preceded by +\fIHZ=\fR\&. A common value on Linux is +\fIHZ=100\fR\&. +.RE +.PP +\fBENVIRON_FILE\fR (string) +.RS 4 +Se questo file esiste ed \(`e leggibile, l\*(Aqambiente di login viene letto da l\(`i\&. Ogni riga deve essere nella forma nome=valore\&. +.sp +Le righe che iniziano con \(Fo#\(Fc sono trattate come commenti e ignorate\&. +.RE +.PP +\fBENV_PATH\fR (string) +.RS 4 +If set, it will be used to define the PATH environment variable when a regular user login\&. The value is a colon separated list of paths (for example +\fI/bin:/usr/bin\fR) and can be preceded by +\fIPATH=\fR\&. The default value is +\fIPATH=/bin:/usr/bin\fR\&. +.RE +.PP +\fBENV_SUPATH\fR (string) +.RS 4 +If set, it will be used to define the PATH environment variable when the superuser login\&. The value is a colon separated list of paths (for example +\fI/sbin:/bin:/usr/sbin:/usr/bin\fR) and can be preceded by +\fIPATH=\fR\&. The default value is +\fIPATH=/sbin:/bin:/usr/sbin:/usr/bin\fR\&. +.RE +.PP +\fBENV_TZ\fR (string) +.RS 4 +If set, it will be used to define the TZ environment variable when a user login\&. The value can be the name of a timezone preceded by +\fITZ=\fR +(for example +\fITZ=CST6CDT\fR), or the full path to the file containing the timezone specification (for example +/etc/tzname)\&. +.sp +If a full path is specified but the file does not exist or cannot be read, the default is to use +\fITZ=CST6CDT\fR\&. +.RE +.PP +\fBLOGIN_STRING\fR (string) +.RS 4 +Il testo da utilizzare per richiedere la password\&. Il valore predefinito \(`e \(FoPassword: \(Fc o una sua traduzione\&. Se si imposta questa variabile allora il testo non verr\(`a tradotto\&. +.sp +If the string contains +\fI%s\fR, this will be replaced by the user\*(Aqs name\&. +.RE +.PP +\fBMAIL_CHECK_ENAB\fR (boolean) +.RS 4 +Abilita la verifica e stampa a video dello stato della casella di posta al momento dell\*(Aqaccesso al sistema\&. +.sp +Andrebbe disabilitato se i file di avvio della shell effettuano gi\(`a questo controllo (\(Fomailx \-e\(Fc o equivalente)\&. +.RE +.PP +\fBMAIL_DIR\fR (string) +.RS 4 +La directory di spool per la posta\&. Questa \(`e necessaria per manipolare la casella di posta quando il corrispondente account utente viene modificato o cancellato\&. Se non \(`e specificata viene utilizzato un valore impostato al momento della compilazione\&. +.RE +.PP +\fBMAIL_FILE\fR (string) +.RS 4 +Imposta la posizione delle caselle di posta degli utenti relative alla loro directory home\&. +.RE +.PP +The +\fBMAIL_DIR\fR +and +\fBMAIL_FILE\fR +variables are used by +\fBuseradd\fR, +\fBusermod\fR, and +\fBuserdel\fR +to create, move, or delete the user\*(Aqs mail spool\&. +.PP +If +\fBMAIL_CHECK_ENAB\fR +is set to +\fIyes\fR, they are also used to define the +\fBMAIL\fR +environment variable\&. +.PP +\fBQUOTAS_ENAB\fR (boolean) +.RS 4 +Enable setting of resource limits from +/etc/limits +and ulimit, umask, and niceness from the user\*(Aqs passwd gecos field\&. +.RE +.PP +\fBSULOG_FILE\fR (string) +.RS 4 +Se definito, tutta l\*(Aqattivit\(`a di \(Fosu\(Fc viene tracciata in questo file\&. +.RE +.PP +\fBSU_NAME\fR (string) +.RS 4 +Se definito \(`e il nome del comando da mostrare quando si esegue \(Fosu \-\(Fc\&. Ad esempio, se lo di definisce come \(Fosu\(Fc allora \(Fops\(Fc mostrer\(`a che il comando \(`e \(Fo\-su\(Fc\&. Se non definito, \(Fops\(Fc mostrer\(`a il nome della shell invocata, come \(Fo\-sh\(Fc\&. +.RE +.PP +\fBSU_WHEEL_ONLY\fR (boolean) +.RS 4 +If +\fIyes\fR, the user must be listed as a member of the first gid 0 group in +/etc/group +(called +\fIroot\fR +on most Linux systems) to be able to +\fBsu\fR +to uid 0 accounts\&. If the group doesn\*(Aqt exist or is empty, no one will be able to +\fBsu\fR +to uid 0\&. +.RE +.PP +\fBSYSLOG_SU_ENAB\fR (boolean) +.RS 4 +Enable "syslog" logging of +\fBsu\fR +activity \- in addition to sulog file logging\&. +.RE +.PP +\fBUSERGROUPS_ENAB\fR (boolean) +.RS 4 +Abilita l\*(Aqimpostazione dei bit di gruppo di umask in modo che siano gli stessi dei bit del proprietario (esempio: 022 \-> 002, 077 \-> 007) per utenti non root a condizione che uid e gid siano identici e che il nome utente sia lo stesso del gruppo primario\&. +.sp +If set to +\fIyes\fR, +\fBuserdel\fR +will remove the user\*(Aqs group if it contains no more members, and +\fBuseradd\fR +will create by default a group with the name of the user\&. +.RE +.SH "FILE" +.PP +/etc/passwd +.RS 4 +Informazioni sugli account utente\&. +.RE +.PP +/etc/shadow +.RS 4 +Informazioni sicure sugli account utente\&. +.RE +.PP +/etc/login\&.defs +.RS 4 +Configurazione del pacchetto password shadow +.RE +.SH "VALORI RESTITUITI" +.PP +On success, +\fBsu\fR +returns the exit value of the command it executed\&. +.PP +If this command was terminated by a signal, +\fBsu\fR +returns the number of this signal plus 128\&. +.PP +If su has to kill the command (because it was asked to terminate, and the command did not terminate in time), +\fBsu\fR +returns 255\&. +.PP +Some exit values from +\fBsu\fR +are independent from the executed command: +.PP +\fI0\fR +.RS 4 +success (\fB\-\-help\fR +only) +.RE +.PP +\fI1\fR +.RS 4 +System or authentication failure +.RE +.PP +\fI126\fR +.RS 4 +The requested command was not found +.RE +.PP +\fI127\fR +.RS 4 +The requested command could not be executed +.RE +.SH "VEDERE ANCHE" +.PP +\fBlogin\fR(1), +\fBlogin.defs\fR(5), +\fBsg\fR(1), +\fBsh\fR(1)\&. |