Provided by: login_4.8.1-2ubuntu2.1_amd64 bug

名称

       login.defs - 影子密码套件配置

描述

       The /etc/login.defs file defines the site-specific configuration for the shadow password
       suite. This file is required. Absence of this file will not prevent system operation, but
       will probably result in undesirable operation.

       This file is a readable text file, each line of the file describing one configuration
       parameter. The lines consist of a configuration name and value, separated by whitespace.
       Blank lines and comment lines are ignored. Comments are introduced with a "#" pound sign
       and the pound sign must be the first non-white character of the line.

       Parameter values may be of four types: strings, booleans, numbers, and long numbers. A
       string is comprised of any printable characters. A boolean should be either the value yes
       or no. An undefined boolean parameter or one with a value other than these will be given a
       no value. Numbers (both regular and long) may be either decimal values, octal values
       (precede the value with 0) or hexadecimal values (precede the value with 0x). The maximum
       value of the regular and long numeric parameters is machine-dependent.

       提供如下配置项:

       PASS_MAX_DAYS, PASS_MIN_DAYS and PASS_WARN_AGE are only used at the time of account
       creation. Any changes to these settings won't affect existing accounts.

交叉引用

       如下交叉引用显示影子密码套件哪个程序使用哪个参数。

       chfn
           CHFN_RESTRICT

       chgpasswd
           ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB SHA_CRYPT_MAX_ROUNDS
           SHA_CRYPT_MIN_ROUNDS

       chpasswd
           SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS

       gpasswd
           ENCRYPT_METHOD MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB SHA_CRYPT_MAX_ROUNDS
           SHA_CRYPT_MIN_ROUNDS

       groupadd
           GID_MAX GID_MIN MAX_MEMBERS_PER_GROUP SYS_GID_MAX SYS_GID_MIN

       groupdel
           MAX_MEMBERS_PER_GROUP

       groupmems
           MAX_MEMBERS_PER_GROUP

       groupmod
           MAX_MEMBERS_PER_GROUP

       grpck
           MAX_MEMBERS_PER_GROUP

       grpconv
           MAX_MEMBERS_PER_GROUP

       grpunconv
           MAX_MEMBERS_PER_GROUP

       lastlog
           LASTLOG_UID_MAX

       login
           CONSOLE_GROUPS DEFAULT_HOME ERASECHAR FAIL_DELAY FAKE_SHELL HUSHLOGIN_FILE KILLCHAR
           LOGIN_RETRIES LOGIN_TIMEOUT LOG_OK_LOGINS LOG_UNKFAIL_ENAB TTYGROUP TTYPERM
           TTYTYPE_FILE USERGROUPS_ENAB

       newgrp / sg
           SYSLOG_SG_ENAB

       newusers
           ENCRYPT_METHOD GID_MAX GID_MIN MAX_MEMBERS_PER_GROUP MD5_CRYPT_ENAB HOME_MODE
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE SHA_CRYPT_MAX_ROUNDS SHA_CRYPT_MIN_ROUNDS
           SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN
           SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN UID_MAX UID_MIN UMASK

       pwck
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE

       pwconv
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE

       su
           CONSOLE_GROUPS DEFAULT_HOME ENV_PATH ENV_SUPATH SULOG_FILE SU_NAME SYSLOG_SU_ENAB

       sulogin
           ENV_HZ

       useradd
           CREATE_HOME GID_MAX GID_MIN HOME_MODE LASTLOG_UID_MAX MAIL_DIR MAX_MEMBERS_PER_GROUP
           PASS_MAX_DAYS PASS_MIN_DAYS PASS_WARN_AGE SUB_GID_COUNT SUB_GID_MAX SUB_GID_MIN
           SUB_UID_COUNT SUB_UID_MAX SUB_UID_MIN SYS_GID_MAX SYS_GID_MIN SYS_UID_MAX SYS_UID_MIN
           UID_MAX UID_MIN UMASK

       userdel
           MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP USERDEL_CMD USERGROUPS_ENAB

       usermod
           LASTLOG_UID_MAX MAIL_DIR MAIL_FILE MAX_MEMBERS_PER_GROUP

缺陷

       Much of the functionality that used to be provided by the shadow password suite is now
       handled by PAM. Thus, /etc/login.defs is no longer used by passwd(1), or less used by
       login(1), and su(1). Please refer to the corresponding PAM configuration files instead.

参见

       login(1), passwd(1), su(1), passwd(5), shadow(5), pam(8).