chage(1)

1CHAGE(1)                         User Commands                        CHAGE(1)
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NAME

6       chage - change user password expiry information
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SYNOPSIS

9       chage [options] [LOGIN]
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DESCRIPTION

12       The chage command changes the number of days between password changes
13       and the date of the last password change. This information is used by
14       the system to determine when a user must change his/her password.
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OPTIONS

17       The options which apply to the chage command are:
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19       -d, --lastday LAST_DAY
20          Set the number of days since January 1st, 1970 when the password was
21          last changed. The date may also be expressed in the format
22          YYYY-MM-DD (or the format more commonly used in your area).
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24       -E, --expiredate EXPIRE_DATE
25          Set the date or number of days since January 1, 1970 on which the
26          user's account will no longer be accessible. The date may also be
27          expressed in the format YYYY-MM-DD (or the format more commonly used
28          in your area). A user whose account is locked must contact the
29          system administrator before being able to use the system again.
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31          Passing the number -1 as the EXPIRE_DATE will remove an account
32          expiration date.
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34       -h, --help
35          Display help message and exit.
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37       -I, --inactive INACTIVE
38          Set the number of days of inactivity after a password has expired
39          before the account is locked. The INACTIVE option is the number of
40          days of inactivity. A user whose account is locked must contact the
41          system administrator before being able to use the system again.
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43          Passing the number -1 as the INACTIVE will remove an account's
44          inactivity.
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46       -l, --list
47          Show account aging information.
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49       -m, --mindays MIN_DAYS
50          Set the minimum number of days between password changes to MIN_DAYS.
51          A value of zero for this field indicates that the user may change
52          his/her password at any time.
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54       -M, --maxdays MAX_DAYS
55          Set the maximum number of days during which a password is valid.
56          When MAX_DAYS plus LAST_DAY is less than the current day, the user
57          will be required to change his/her password before being able to use
58          his/her account. This occurrence can be planned for in advance by
59          use of the -W option, which provides the user with advance warning.
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61          Passing the number -1 as MAX_DAYS will remove checking a password's
62          validity.
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64       -W, --warndays WARN_DAYS
65          Set the number of days of warning before a password change is
66          required. The WARN_DAYS option is the number of days prior to the
67          password expiring that a user will be warned his/her password is
68          about to expire.
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70       If none of the options are selected, chage operates in an interactive
71       fashion, prompting the user with the current values for all of the
72       fields. Enter the new value to change the field, or leave the line
73       blank to use the current value. The current value is displayed between
74       a pair of [ ] marks.
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NOTE

77       The chage program requires a shadow password file to be available.
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79       The chage command is restricted to the root user, except for the -l
80       option, which may be used by an unprivileged user to determine when
81       his/her password or account is due to expire.
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FILES

84       /etc/passwd
85          User account information.
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87       /etc/shadow
88          Secure user account information.
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EXIT VALUES

91       The chage command exits with the following values:
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93       0  success
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95       1  permission denied
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97       2  invalid command syntax
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99       15 can't find the shadow password file
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