Configuring a System Login Message and Announcement
A system login message appears before the user logs in and a system login announcement appears after the user logs in. By default, no login message or announcement is displayed on the device.
To configure a system login message, use the following command:
[edit] user@host# set system login message login-message-banner-text
To configure system announcement, use the following command:
[edit] user@host# set system login announcement system-announcement-text