shadow/man/chpasswd.8

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.TH "CHPASSWD" 8 "" "" ""
.SH NAME
chpasswd \- update passwords in batch mode
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 9
\fBchpasswd\fR [\fIoptions\fR]
.ad
.hy

.SH "DESCRIPTION"

.PP
\fBchpasswd\fR 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 supplied password must be in clear\-text\&. Default encription algoritm is DES\&. Also the password age will be updated, if present\&.

.PP
This command is intended to be used in a large system environment where many accounts are created at a single time\&.

.SH "OPTIONS"

.PP
The options which apply to the \fBchpasswd\fR command are:

.TP
\fB\-e\fR, \fB\-\-encrypted\fR
Supplied passwords are in encrypted form\&.

.TP
\fB\-h\fR, \fB\-\-help\fR
Display help message and exit\&.

.TP
\fB\-m\fR, \fB\-\-md5\fR
Use MD5 encryption instead DES when the supplied passwords are not encrypted\&.

.SH "CAVEATS"

.PP
Remember keep protected for reading by others fille passed to standard input \fBchpasswd\fR command if it contains unencrypted passwords\&.

.SH "SEE ALSO"

.PP
\fBpasswd\fR(1), \fBnewusers\fR(8), \fBuseradd\fR(8) 

.SH "AUTHOR"

.PP
Julianne Frances Haugh (jockgrrl@ix\&.netcom\&.com)