O'Reilly logo

Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Name

chage

Synopsis

chage [options] user

Change information about user password expirations. If run with no option flags, chage prompts for values to be entered; you may also use option flags to change or view information. Requires a shadow password file. An unprivileged user can only run chage with the -l option.

Options

-d lastday, --lastday=lastday

Date of last password change. This may be expressed as a date in YYYY-MM-DD format, or as the number of days between January 1, 1970 and the last password change.

-E expiredate, --expiredate=expiredate

Set the date when the account will be locked. This is not a date for password expiration, but for account expiration. It may be expressed in YYYY-MM-DD format or as a number of days since January 1, 1970.

-I inactivedays, --inactive=inactivedays

If a password expires and the user does not log in for this number of days, the account will be locked and the user must contact a system administrator before logging in. Set to 0 to disable the feature.

-l, --list

This flag is used without any others and causes chage to display the current password expiration attributes for the user.

-m mindays, --mindays=mindays

Specify the minimum number of days between password changes. Default is zero, meaning that the user may change the password at any time.

-M maxdays, --maxdays=maxdays

Maximum number of days between password changes.

-W warndays, --warndays=warndays

The number of days before password expiration that a user will be warned to change passwords.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required