关于密码过期时间和用户过期时间的设置，通常使用chage命令和usermod命令。

设置某个用户的过期时间（accountexpires）可以用usermod -e来设置

查看某个用户的密码（passwordexpires）过期时间等信息，可以用：chage-l username

如：chage-l lizi

就会给出lizi这个用户的密码过期时间信息：

Last password change					: Nov 26, 2014
Password expires					: Feb 24, 2015
Password inactive					: never
Account expires						: never
Minimum number of days between password change		: 1
Maximum number of days between password change		: 90
Number of days of warning before password expires	: 7

修改单个用户的密码过期时间，可以用chage-M days username来设置。

如：chage-M 99999 lizi

就是把lizi这个用户的最大期限设置为无限，lizi这个用户的密码就永远不会过期了。

关闭某个用户密码的ageing/expiring功能，可以将该用户的chage信息设置为如下内容：

set Minimum Password Age to 0
setMaximum Password Age to 99999
set Password Inactive to -1
setAccount Expiration Date to -1

使用命令行来设置就是：chage-I -1 -m 0 -M 99999 -E -1 username

统一设置所有用户的密码过期时间，可以修改/etc/login.defs里面的PASS_MAX_DAYS

chage的具体信息：

Usage: chage [options] [LOGIN]

Options:
  -d, --lastday LAST_DAY        set date of last password change to LAST_DAY
  -E, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE
  -h, --help                    display this help message and exit
  -I, --inactive INACTIVE       set password inactive after expiration
                                to INACTIVE
  -l, --list                    show account aging information
  -m, --mindays MIN_DAYS        set minimum number of days before password
                                change to MIN_DAYS
  -M, --maxdays MAX_DAYS        set maximim number of days before password
                                change to MAX_DAYS
  -W, --warndays WARN_DAYS      set expiration warning days to WARN_DAYS

usermod 的具体信息

Usage: usermod [options] LOGIN

Options:
  -c, --comment COMMENT         new value of the GECOS field
  -d, --home HOME_DIR           new home directory for the user account
  -e, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE
  -f, --inactive INACTIVE       set password inactive after expiration
                                to INACTIVE
  -g, --gid GROUP               force use GROUP as new primary group
  -G, --groups GROUPS           new list of supplementary GROUPS
  -a, --append                  append the user to the supplemental GROUPS
                                mentioned by the -G option without removing
                                him/her from other groups
  -h, --help                    display this help message and exit
  -l, --login NEW_LOGIN         new value of the login name
  -L, --lock                    lock the user account
  -m, --move-home               move contents of the home directory to the
                                new location (use only with -d)
  -o, --non-unique              allow using duplicate (non-unique) UID
  -p, --password PASSWORD       use encrypted password for the new password
  -s, --shell SHELL             new login shell for the user account
  -u, --uid UID                 new UID for the user account
  -U, --unlock                  unlock the user account
  -Z, --selinux-user            new SELinux user mapping for the user account