chage - Unix, Linux Command


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NAME

chage change user password expiry information

SYNOPSIS

chage [options] [LOGIN] 

DESCRIPTION

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

OPTIONS

TAG DESCRIPTION
-d, --lastday LAST_DAY Set the number of days since January 1st, 1970 when the password was last changed. The date may also be expressed in the format YYYY-MM-DD (or the format more commonly used in your area).
-E, --expiredate EXPIRE_DATE Set the date or number of days since January 1, 1970 on which the user's account will no longer be accessible. The date may also be expressed in the format YYYY-MM-DD (or the format more commonly used in your area). A user whose account is locked must contact the system administrator before being able to use the system again.Passing the number -1 as the EXPIRE_DATE will remove an account expiration date.
-h, --help Display help message and exit.
-I, --inactive INACTIVE Set the number of days of inactivity after a password has expired before the account is locked. The INACTIVE option is the number of days of inactivity. A user whose account is locked must contact the system administrator before being able to use the system again. Passing the number -1 as the INACTIVE will remove an account's inactivity.
-l, --list Show account aging information.
-m, --mindays MIN_DAYS Set the minimum number of days between password changes to MIN_DAYS. A value of zero for this field indicates that the user may change his/her password at any time.
-M, --maxdays MAX_DAYS Set the maximum number of days during which a password is valid. When MAX_DAYS plus LAST_DAY is less than the current day, the user will be required to change his/her password before being able to use his/her account. This occurrence can be planned for in advance by use of the -W option, which provides the user with advance warning.Passing the number -1 as MAX_DAYS will remove checking a password's validity.
-W, --warndays WARN_DAYS Set the number of days of warning before a password change is required. The WARN_DAYS option is the number of days prior to the password expiring that a user will be warned his/her password is about to expire.

EXAMPLES

EXAMPLE-1:

Use chage command to list the password aging information of a user

$ chage -l testuser

output:

Last password change : May 01, 2016
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 : 15

EXAMPLE-2:

Disable password aging for a user

$ chage -I -1 -m 0 -M 99999 -E -1 testuser

-I -1 : This will set the “Password inactive” to never

-m 0 : This will set the minimum number of days between password change to 0

-M 99999 : This will set the maximum number of days between password change to 99999

-E -1 : This will set “Account expires” to never.

This will disable the password expiry of a user if it is already enabled.

 

EXAMPLE-3:

Enable password expiry date of a user

$ chage -M 20 testuser

Output
Last password change : May 01, 2016
Password expires : May 21, 2017
Password inactive : never
Account expires : never
Minimum number of days between password change : 0
Maximum number of days between password change : 20
Number of days of warning before password expires : 15

 

EXAMPLE-4:

Set the Account expiry date in the format YYYY-MM-DD

$ chage -E 2017-05-28

output:
Last password change : May 01, 2016
Password expires : May 28, 2017
Password inactive : never
Account expires : May 28, 2012
Minimum number of days between password change : 0
Maximum number of days between password change : 20
Number of days of warning before password expires : 15

EXAMPLE-5:

Set the password expiry warning message

$ chage -W 10 testuser

User will start getting warning about the password expiry which is set to 10 days.

EXAMPLE-6:

Forcing the users to change the password on next logon

$ chage -d 0 testuser

This will reset “Last Password Change” to “Password must be changed”.

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