A system administrator needs to display a standardized warning message to all users who attempt to access a server directly from the local console. This message must appear on the terminal screen before the login prompt is presented. Which file should the administrator modify to implement this security banner?
/etc/issue
/etc/issue.net
/etc/motd
/etc/profile
The correct file to modify is /etc/issue. This file's content is displayed by getty or a similar program before the login prompt appears for local console and terminal sessions. The file /etc/motd (Message of the Day) is incorrect because its content is shown to users after they have successfully authenticated. The file /etc/issue.net is primarily used for displaying a banner for remote, non-encrypted connections like Telnet and is not typically used for local console logins. SSH, for instance, does not use this file by default and has its own Banner directive in its configuration. The file /etc/profile is a system-wide script that is executed to set environment variables and run startup programs after a user has logged in, not before.
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