Which command, available with all MTAs, is used to list the contents of the MTA's mail queue? (Specify ONLY the command without any path or parameters.)

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How do shadow passwords improve the password security in comparison to standard non-shadow passwords?

• A.Every shadow password is valid tor 45 days and must be changed afterwards.
• B.Shadow passwords are stored in plain text and can be checked for weak passwords.
• C.The system's host key is used to encrypt all shadow passwords.
• D.Shadow passwords are always combined with a public key that has to match the user's private key.
• E.Regular users do not have access to the password hashes of shadow passwords.

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What is true about the ntpdate command?

• A.It is the primary management command for the NTP time server.
• B.It updates the local system's date (i.e. day, month and year) but not the time (i.e. hours, minutes, seconds).
• C.It queries one or more NTP time servers and adjusts the system time accordingly.
• D.It sends the local system time to one or many remote NTP time servers for redistribution.
• E.It can be used by any user to set the user clock independently of the system clock.

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FILL BLANK
Which environment variable is used by an X11 client to determine the X Server to connect to?
(Specify only the variable name without any preceding commands or values.)

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What is the name of the simple graphical login manager that comes with a vanilla X11 installation? (Specify ONLY the command without any path or parameters.)

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