linux新增用户和删除用户

#

# Please note that the parameters in this configuration file control the

# behavior of the tools from the shadow-utils component. None of these

# tools uses the PAM mechanism, and the utilities that use PAM (such as the

# passwd command) should therefore be configured elsewhere. Refer to

# /etc/pam.d/system-auth for more information.

#

# *REQUIRED*

#   Directory where mailboxes reside, _or_ name of file, relative to the

#   home directory.  If you _do_ define both, MAIL_DIR takes precedence.

#   QMAIL_DIR is for Qmail

#

#QMAIL_DIR   Maildir

MAIL_DIR         /var/spool/mail

#MAIL_FILE      .mail

# Password aging controls:

#

#       PASS_MAX_DAYS     Maximum number of days a password may be used.

#       PASS_MIN_DAYS      Minimum number of days allowed between password changes.

#       PASS_MIN_LEN        Minimum acceptable password length.

#       PASS_WARN_AGE    Number of days warning given before a password expires.

#

PASS_MAX_DAYS     99999

PASS_MIN_DAYS      0

PASS_MIN_LEN        5

PASS_WARN_AGE    7

#

# Min/max values for automatic uid selection in useradd

#

UID_MIN                     500

UID_MAX                            60000

#

# Min/max values for automatic gid selection in groupadd

#

GID_MIN                     500

GID_MAX                            60000

#

# If defined, this command is run when removing a user.

# It should remove any at/cron/print jobs etc. owned by

# the user to be removed (passed as the first argument).

#

#USERDEL_CMD      /usr/sbin/userdel_local

#

# If useradd should create home directories for users by default

# On RH systems, we do. This option is overridden with the -m flag on

# useradd command line.

#

CREATE_HOME        yes

# The permission mask is initialized to this value. If not specified,

# the permission mask will be initialized to 022.

UMASK           077

# This enables userdel to remove user groups if no members exist.

#

USERGROUPS_ENAB yes

# Use SHA512 to encrypt password.

ENCRYPT_METHOD SHA512

[root@localhost etc]# chage -l tiger

Last password change                                          : Jun 17, 2017

Password expires                                          : never

Password inactive                                         : never

Account expires                                                      : never

Minimum number of days between password change            : 0

Maximum number of days between password change           : 99999

Number of days of warning before password expires     : 7