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.

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 be configured elsewhere. The only values that affect PAM modules are ENCRYPT_METHOD and SHA_CRYPT_MAX_ROUNDS for pam_unix module, FAIL_DELAY for pam_faildelay module, and UMASK for pam_umask module. Refer to pam(8) for more information.

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。

chgpasswd

chpasswd

gpasswd

groupadd

groupdel

groupmems

groupmod

grpck

grpconv

grpunconv

lastlog

newgrp / sg

newusers

pwck

pwconv

useradd

userdel

usermod

参见¶

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