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'\" t
.\" Title: chpasswd
.\" 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: German
.\"
.TH "CHPASSWD" "8" "21.06.2024" "shadow\-utils 4\&.15\&.2" "System Management Commands"
.\" -----------------------------------------------------------------
.\" * 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 "NAME"
chpasswd \- aktualisiert Passw\(:orter im Stapel\-Modus
.SH "\(:UBERSICHT"
.HP \w'\fBchpasswd\fR\ 'u
\fBchpasswd\fR [\fIoptions\fR]
.SH "BESCHREIBUNG"
.PP
The
\fBchpasswd\fR
command reads a list of user name and password pairs from standard input and uses this information to update a group of existing users\&. Each line is of the format:
.PP
\fIuser_name\fR:\fIpassword\fR
.PP
By default the passwords must be supplied in clear\-text, and are encrypted by
\fBchpasswd\fR\&. Also the password age will be updated, if present\&.
.PP
The default encryption algorithm can be defined for the system with the
\fBENCRYPT_METHOD\fR
or
\fBMD5_CRYPT_ENAB\fR
variables of
/etc/login\&.defs, and can be overwritten with the
\fB\-e\fR,
\fB\-m\fR, or
\fB\-c\fR
options\&.
.PP
\fBchpasswd\fR
first updates all the passwords in memory, and then commits all the changes to disk if no errors occurred for any user\&.
.PP
Dieser Befehl ist f\(:ur weitreichende Systeme gedacht, bei denenviele Passw\(:orter gleichzeitig aktualisiert werden m\(:ussen\&.
.SH "OPTIONEN"
.PP
The options which apply to the
\fBchpasswd\fR
command are:
.PP
\fB\-c\fR, \fB\-\-crypt\-method\fR\ \&\fIMETHOD\fR
.RS 4
definiert die Methode, mit der die Passw\(:orter verschl\(:usselt werden\&.
.sp
The available methods are
\fIDES\fR,
\fIMD5\fR, \fISHA256\fR, \fISHA512\fR
and
\fINONE\fR
if your libc supports these methods\&.
.sp
By default (if none of the
\fB\-c\fR,
\fB\-m\fR, or
\fB\-e\fR
options are specified), the encryption method is defined by the
\fBENCRYPT_METHOD\fR
or
\fBMD5_CRYPT_ENAB\fR
variables of
/etc/login\&.defs\&.
.RE
.PP
\fB\-e\fR, \fB\-\-encrypted\fR
.RS 4
Passw\(:orter werden verschl\(:usselt geliefert\&.
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
zeigt die Hilfe an und beendet das Programm\&.
.RE
.PP
\fB\-m\fR, \fB\-\-md5\fR
.RS 4
Zur Verschl\(:usselung MD5 anstelle von DES verwenden, wenn die Passw\(:orter unverschl\(:usselt geliefert werden\&.
.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\-P\fR, \fB\-\-prefix\fR\ \&\fIPREFIX_DIR\fR
.RS 4
Apply changes to configuration files under the root filesystem found under the directory
\fIPREFIX_DIR\fR\&. 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
.PP
\fB\-s\fR, \fB\-\-sha\-rounds\fR\ \&\fIROUNDS\fR
.RS 4
legt die Anzahl von Runden beim Verschl\(:usseln von Passw\(:ortern fest\&.
.sp
You can only use this option with crypt method:
\fISHA256\fR \fISHA512\fR
.sp
By default, the number of rounds for SHA256 or SHA512 is defined by the SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS variables in
/etc/login\&.defs\&.
.sp
A minimal value of 1000 and a maximal value of 999,999,999 will be enforced for SHA256 and SHA512\&. The default number of rounds is 5000\&.
.RE
.SH "WARNUNGEN"
.PP
Achten Sie darauf, dass die Zugriffsrechte der unverschl\(:usselten Datei beziehungsweise
\fBUMASK\fR
ausschlie\(ssen, dass andere Benutzer sie lesen k\(:onnen\&.
.SH "KONFIGURATION"
.PP
The following configuration variables in
/etc/login\&.defs
change the behavior of this tool:
.SH "DATEIEN"
.PP
/etc/passwd
.RS 4
Informationen zu den Benutzerkonten
.RE
.PP
/etc/shadow
.RS 4
gesch\(:utzte Informationen zu den Benutzerkonten
.RE
.PP
/etc/login\&.defs
.RS 4
konfiguriert die Shadow\-Hilfsprogramme\&.
.RE
.SH "SIEHE AUCH"
.PP
\fBpasswd\fR(1),
\fBnewusers\fR(8),
\fBlogin.defs\fR(5),
\fBuseradd\fR(8)\&.
|
