Summery
Linux,macのユーザーパスワードを変更する。
管理権限の場合は、現在ログインしているユーザー以外も編集できる。
Construction
$ passwd [*user]
$ *inpput-password
Sample
# 現在ログイン中のユーザーパスワードの変更
$ passwd
$ *****
# 管理権限での別ユーザーパスワード変更
$ passwd hoge
$ *****
Discription
NAME
passwd -- modify a user's password
SYNOPSIS
passwd [-i infosystem [-l location]] [-u authname] [user]
DESCRIPTION
The passwd utility changes the user's password. If the user is not
the super-user, passwd first prompts for the current password and
will not continue unless the correct password is entered.
When entering the new password, the characters entered do not echo,
in order to avoid the password being seen by a passer-by. The
passwd utility prompts for the new password twice in order to
detect typing errors.
The new password should be at least six characters long and not
purely alphabetic. Its total length should be less than
_PASSWORD_LEN (currently 128 characters), although some directory
systems allow longer passwords. Numbers, upper case letters, and
meta characters are encouraged.
Once the password has been verified, passwd communicates the new
password to the directory system.
-i infosystem
This option specifies where the password update should be
applied. Under Mac OS X 10.5 and later, supported directory
systems are:
PAM (default) Pluggable Authentication Modules.
opendirectory
A system conforming to Open Directory APIs and support-
ing updates (including LDAP, etc). If no -l option is
specified, the search node is used.
file The local flat-files (included for legacy configura-
tions).
nis A remote NIS server containing the user's password.
-l location
This option causes the password to be updated in the given
location of the chosen directory system.
for file,
location may be a file name (/etc/master.passwd is the
default)
for nis,
location may be a NIS domainname
for opendirectory,
location may be a directory node name
for PAM,
location is not used
-u authname
This option specifies the user name to use when authenticat-
ing to the directory node.
user This optional argument specifies the user account whose pass-
word will be changed. This account's current password may be
required, even when run as the super-user, depending on the
directory system.
FILES
/etc/master.passwd The user database
/etc/passwd A Version 7 format password file
/etc/passwd.XXXXXX Temporary copy of the password file
SEE ALSO
chpass(1), login(1), dscl(1), passwd(5), pwd_mkdb(8), vipw(8)
Robert Morris and Ken Thompson, UNIX password security.
HISTORY
A passwd command appeared in Version 6 AT&T UNIX.
0 件のコメント:
コメントを投稿