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Which command can be used to change the password for an LDAP entry?

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According to the tcpdump output below, what is the IP address of the client host?

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Running tcpdump -nli eth1 ‘icmp’ shows the following output:
11:56:35.599063 IP 192.168.123.5 > 194.25.2.129: icmp 64: echo request seq 1
11:56:35.670910 IP 194.25.2.129 > 192.168.123.5: icmp 64: echo reply seq 1
What command was used on the host 192.168.123.5, to generate this output?

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Please enter the complete command to create a new password file for HTTP basic authentication
(/home/http/data/web _passwd) for user john.

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Which file on a Postfix server modifies the sender address for outgoing e-mails? Please enter only
the file name without the path

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Which command can be used to save the current iptables rules into a file? Please enter only the
command without path or parameters.

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All machines outside the network are able to send emails through the server to addresses not
served by that server. If the server accepts and delivers the email, then it is a (n) _____________.

Please enter the English term, without any punctuation.

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Please enter the command used to remove Kerberos tickets from the cache below.

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Please enter the Kerberos 5 configuration file name without path below.

Which of these tools, without any options, provides the most information when performing DNS
queries?