chage:tldr:f2485

This command is used to change the expiration date of a user's password. Here's a breakdown of each part:

• sudo: It is a command that allows a user to run commands with the security privileges of another user, usually the superuser (root).
• chage: It is a command-line utility used to modify the password expiry information for a user account.
• --lastday: It is an option used with the chage command to set the last day of password validity.
• ${0}: It represents the current date or the day when the command is being executed.
• ${username}: It represents the username for which the password expiration is being changed.

In summary, this command with appropriate values for ${0} and ${username} would change the expiration date of the password for the given username to the current date.