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console login : number of access failures

Hi list,

1- by default on our Debian system after a successful login through a tty we are presented with the number of failures (unsuccesful logins) that took place before using the same login name.For a non root user this number is correct.

But what about the root user ? That number is correct unless none tried to do "su logins" (login using the command su). Do you think that su-logins must be considered as "general logins" and then the super user must know how many unsuccessful "su-logins" took place ? And what about the date and time of the last root login ? :-) Well, as a solution one could forbid the "su-login" but sometimes that command can be useful.

2 - by default whenever I press CTRL-D to log out as a non root user the screen is cleaned ... whenever I press CTRL-D to log out as a root user the screen is not cleaned - and maybe a non root user can see what the root did before ! Why did they choose this behavior ??

thank you for your attention, I appreciate suggestions and opinions ;)



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