102-500Preview

Which of the following fields are available in the standard format of both the global /etc/crontab file as well as in user-specific crontab files? (Choose two.)

Which of the following commands displays all environment and shell variables?

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The presence of what file will temporarily prevent all users except root from logging into a system? (Specify the full name of the file, including path.)

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Which file, if present, must contain all users that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)

Which of the following steps prevents a user from obtaining an interactive login session?

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What is the top-level directory which contains the configuration files for CUPS? (Specify the full path to the directory.)

Which of the following commands preloads and manages existing SSH keys that are used for automatic authentication while logging in to order machines using
SSH?

Depending on a system's configuration, which of the following files can be used to enable and disable network services running on this host?

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Which command included in NetworkManager is a curses application which provides easy acces to the NetworkManager on the command line? (Specify only the command without any path or parameters.)

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Which command, available with all sendmail-compatible 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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Which command is used to set the hostname of the local system? (Specify only the command without any path or parameters.)

Which configuration file contains the default options for SSH clients?

What output is produced by the following command sequence?
echo '1 2 3 4 5 6' | while read a b c; do
echo result $c $b $a;
done

Which of the following is a valid IPv6 address?

What output does the command seq 1 5 20 produce?

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Which command is used to sync the hardware clock to the system clock? (Specify only the command without any path or parameters.)

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What command is used to add OpenSSH private keys to a running ssh-agent instance? (Specify the command name only without any path.)

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Which directory holds configuration files for xinetd services? (Specify the full path to the directory.)

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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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Which command included in systemd supports selecting messages from the systemd journal by criteria such as time or unit name? (Specify only the command without any path or parameters.)

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Which command must be run after adding a new email alias to the configuration in order to make this change effective? (Specify the command without any path but including all required parameters.)

On a system using systemd-journald, which of the following commands add the message Howdy to the system log? (Choose two.)

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What command, depending on its options, can display the open TCP connections, the routing tables, as well as network interface statistics? (Specify only the command without any path or parameters.)

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Which option in the /etc/ntp.conf file specifies an external NTP source to be queried for time information? (Specify only the option without any values or parameters.)